研究者詳細 - 枝園　忠彦

論文 - 枝園　忠彦

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Design Paper: A Prospective, Multicenter, Single-arm, Phase II Trial of Tailored Axillary Surgery in Patients with Clinically Node-positive Breast Cancer in the Upfront Surgery Setting.

Yasuaki Sagara, Kaori Terata, Takehiko Sakai, Shin Takayama, Dai Kitagawa, Tsuguo Iwatani, Takahiro Tsukioki, Mami Ogita, Naoko Sanuki, Masayuki Yoshida, Hitoshi Tsuda, Seiichiro Yamamoto, Hiroji Iwata, Tadahiko Shien

JMA journal 8 ( 1 ) 264 - 269 2025年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: This prospective, multicenter, single-arm Phase II trial investigates the feasibility and the safety of tailored axillary surgery (TAS) in patients with clinically node-positive breast cancer who are undergoing upfront surgery. The trial aims to establish the criteria for safely omitting axillary lymph node dissection (ALND) in these cases, potentially shifting breast cancer management by minimizing surgical complications and preserving the patients' quality of life (QOL). METHODS: The study includes patients who were diagnosed with invasive breast cancer, particularly those with limited metastatic lymph nodes. The primary objective of this work is to determine the specific combination of clinical and pathological factors that would result in a non-TAS lymph node metastasis proportion of less than 10%. The secondary objectives include assessing the identification rate of the metastatic lymph nodes, the incidence of upper limb lymphedema, and the QOL measures. RESULTS: The results will identify the patient eligibility criteria for the Phase III TAS trial, potentially allowing the omission of ALND in selected patients. This may lead to reduced surgical complications and better preservation of the QOL of patients with breast cancer. CONCLUSIONS: The trial's outcome will contribute to the development of the criteria for safely omitting ALND in certain patients with clinically node-positive breast cancer. This approach aims to enhance breast cancer management by reducing surgical burden and improving the patient outcomes.jRCTs: 061220113.

DOI： 10.31662/jmaj.2024-0187

[Ⅱ. Recurrence Score in Patients with BRCA1/2 Mutation from the OlympiA and TAILORx Trial Results].

Yuko Takahashi, Takahiro Tsukioki, Tsuguo Iwatani, Tadahiko Shien

Gan to kagaku ryoho. Cancer & chemotherapy 51 ( 12 ) 1209 - 1211 2024年12月

乳腺内分泌腫瘍臨床病理学的検査と遺伝学的検査からルミナール乳癌の周術期薬物療法の適応を考える OlympiA試験とTAILORx試験

高橋侑子, 突沖貴宏, 岩谷胤生, 枝園忠彦

癌と化学療法 51 ( 12 ) 1209 - 1211 2024年12月

Real-World Comparative Analysis of Trastuzumab Originator and Biosimilars: Safety, Efficacy, and Cost Effectiveness. 査読国際誌

Tomoka Mamori, Maki Tanioka, Kenji Takada, Hirofumi Hamano, Takahiro Tsukioki, Yuko Takahashi, Tsuguo Iwatani, Tadahiko Shien, Shinichi Toyooka

BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy 2024年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Despite the global use of trastuzumab biosimilars, concerns remain regarding their efficacy and safety. In particular, when used concurrently with pertuzumab, trastuzumab biosimilars lack extensive real-world data and safety information. Additionally, as cancer drug expenditures continue to rise worldwide, cost savings from biosimilars have become increasingly important. OBJECTIVE: This study aims to assess the safety, efficacy, and cost effectiveness of trastuzumab originators and their biosimilars in real-world clinical settings, focusing on a large patient population. METHODS: The analysis included 31,661 patients with HER2-positive breast cancer from the Medical Data Vision Co., Ltd. database in Japan. Additionally, adverse event reports for the trastuzumab originator and its biosimilars were obtained for 58,799 patients from the World Health Organization's VigiBase, the global adverse event reporting database. RESULTS: No significant differences were observed in heart failure hospitalizations, liver dysfunction, or infusion reaction rates in both the Medical Data Vision Co., Ltd. database and the World Health Organization's VigiBase. In the Medical Data Vision Co., Ltd. database, the addition of pertuzumab did not significantly influence the incidence of adverse events, and the use of biosimilars significantly reduced medical costs, with no significant difference in breast cancer recurrence rates. CONCLUSIONS: By analyzing two large and diverse datasets from multiple perspectives, we obtained reliable results that the trastuzumab originator and its biosimilars have similar safety profiles. The concurrent use of pertuzumab was also found to be safe. The use of biosimilars can lead to cost savings. These findings provide crucial insights for the evaluation and adoption of biosimilars in clinical practice.

DOI： 10.1007/s40259-024-00686-x

Radiation hepatitis after postmastectomy radiation therapy for early breast cancer: difficult to differentiate from drug-induced liver injury caused by abemaciclib. 国際誌

Shogo Nakamoto, Takahiro Waki, Asuka Mimata, Takahiro Tsukioki, Yuko Takahashi, Yoko Iwatani, Tsuguo Iwatani, Tadahiko Shien

International cancer conference journal 13 ( 4 ) 471 - 475 2024年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

Abemaciclib (ABM) is recommended for adjuvant endocrine therapy in hormone receptor-positive, human epidermal growth factor receptor type 2-negative early breast cancer (EBC) patients at high risk of recurrence. Here, we present a case of radiation hepatitis challenging to differentiate from drug-induced liver injury during ABM treatment. The patient, a woman in her 40 s, underwent right mastectomy, axillary dissection, and postmastectomy radiation therapy (PMRT) after neoadjuvant chemotherapy for EBC. Subsequently, she received ABM as adjuvant endocrine therapy. Despite suspending ABM due to Grade 3 leukopenia, she developed Grade 3 hepatic dysfunction upon cessation. Based on the dynamic contrast-enhanced computed tomography, we diagnosed the cause of liver dysfunction as radiation hepatitis. Spontaneous improvement allowed us to resume ABM treatment. Clinicians may need to consider radiation hepatitis as a potential cause of hepatic dysfunction in patients who underwent PMRT, along with drug-induced liver injury.

DOI： 10.1007/s13691-024-00714-1

明日からの乳癌診療に使える!最新の薬剤の使いどころ転移・再発乳癌に対するSG(サシツズマブゴビテカン)の使いどころ

突沖貴宏, 三又明日香, 中本翔伍, 岩谷陽子, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本癌治療学会学術集会抄録集 62回 OSY11 - 5 2024年10月

異時性遠隔再発を認めた非浸潤性乳管癌の2例

藤原由樹, 枝園忠彦, 三又明日香, 中本翔伍, 突沖貴宏, 高橋侑子, 谷岡真樹, 岩谷胤生

日本癌治療学会学術集会抄録集 62回 P73 - 2 2024年10月

Primary angiosarcoma of the breast: a literature review. 査読国際誌

Yidan Zhu, Shogo Nakamoto, Takahiro Tsukioki, Yuko Takahashi, Yoko Iwatani, Tsuguo Iwatani, Xinfeng Zhang, Maki Tanioka, Tadahiko Shien

Chinese clinical oncology 2024年9月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND AND OBJECTIVE: Primary angiosarcoma of the breast (PBA) is an extremely rare and heterogeneous disease. PBA is difficult to diagnose and has a poor prognosis. In order to better understand the disease and provide evidence-based treatment for PBA patients, a review of the published literature in the English language was conducted. METHODS: A literature review in agreement with the PRISMA protocol was conducted. Medline and Cochrane databases were searched for English articles on PBA patients in September 2023 with a predetermined strategy. The articles were categorized and assessed based on hierarchical levels of scientific evidence. KEY CONTENT AND FINDINGS: A total of 255 articles were identified, among these 137 publications which included 1,888 patients met the criteria for inclusion in the final analysis. No prospective, randomized trials exclusive to PBA have been recognized. This article provides an overview of the most current and comprehensive evidence concerning the epidemiology, etiology, genomic features, clinical presentations, diagnosis, treatment, and prognosis of PBA. CONCLUSIONS: Despite the fact that current evidence is largely derived from retrospective studies, database analyses, and case reports, we utilized this information to tackle important clinical questions concerning optimal patient management practices for PBA. Complete surgical excision continues to be the mainstay treatment for PBA. However, the effectiveness of adjuvant therapies is still unclear. This narrative review highlights the urgent need for more rigorously designed research to enhance the management and treatment strategies for PBA.

DOI： 10.21037/cco-24-16

Reply to the Letter to the editor "Does axillary lymph node recurrence breast cancer subtype information matter for prognosis estimation?". 査読

Hirohito Seki, Shinsuke Sasada, Tadahiko Shien

Breast cancer (Tokyo, Japan) 2024年9月

Prognosis of isolated locoregional recurrence after early breast cancer with immediate breast reconstruction surgery: a retrospective multi‑institutional study. 査読

Hirohito Seki, Akiko Ogiya, Naomi Nagura, Ayaka Shimo, Kazutaka Narui, Shinsuke Sasada, Makoto Ishitobi, Hiroko Nogi, Naoto Kondo, Teruhisa Sakurai, Chikako Yamauchi, Hiroki Mori, Miho Saiga, Naoki Niikura, Tadahiko Shien

Breast cancer (Tokyo, Japan) 31 ( 5 ) 935 - 944 2024年9月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The prognosis in patients with breast cancer with isolated locoregional recurrence (ILRR) without simultaneous distant metastases after immediate breast reconstruction (IBR) remains unknown. We aimed to investigate the prognosis in this patient population. METHODS: This multi-institutional retrospective observational study evaluated 3295 patients with primary breast cancer who underwent IBR at 12 Japanese medical facilities between January 1, 2008 and December 31, 2016. The outcome measures were the prognostic factors for ILRR after IBR, 5-year distant metastasis-free interval (DMFI), and 5-year overall survival (OS). RESULTS: Mastectomy or skin-sparing mastectomy was performed in 3295 patients. ILRR occurred in 70 patients, and the median observation period from ILRR diagnosis was 39.3 months. Of the 70 patients, 9 (12.9%) had axillary lymph node recurrence (ALNR) at the time of ILRR diagnosis. The 5-year DMFI and OS rates after ILRR were 92.4% and 91.2%, respectively. Pathological lymph node metastasis at primary surgery (P = 0.041) and ALNR (P = 0.022) at ILRR were significantly associated with DMFI in the univariate analysis. ALNR was the only independent prognostic factor in the multivariate analysis (P = 0.041). Post-mastectomy radiation therapy (PMRT; P = 0.022) and ALNR (P = 0.043) were significantly associated with OS in the univariate analysis, and both PMRT (P = 0.010) and ALNR (P = 0.028) were independent prognostic factors in the multivariate analysis for OS. CONCLUSIONS: Although patients with breast cancer who had ILRR after IBR have favorable prognosis, ALNR may lead to poor prognosis. To the best of our knowledge, this study is the first to report the prognosis of these patients.

DOI： 10.1007/s12282-024-01607-0

The effect of exercise and educational programs for breast cancer patients on the development of breast cancer-related lymphoedema: secondary endpoint from a randomized controlled trial in the Setouchi Breast Project-10. 査読

Shogo Nakamoto, Takayuki Iwamoto, Naruto Taira, Yukiko Kajiwara, Kengo Kawada, Daisuke Takabatake, Yuichiro Miyoshi, Shinichiro Kubo, Yoko Suzuki, Mari Yamamoto, Yutaka Ogasawara, Minami Hatono, Seiji Yoshitomi, Kyoko Hara, Asako Sasahara, Shozo Ohsumi, Masahiko Ikeda, Hiroyoshi Doihara, Yuri Mizota, Seiichiro Yamamoto, Tadahiko Shien, Shinichi Toyooka

Breast cancer (Tokyo, Japan) 31 ( 5 ) 969 - 978 2024年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Although the association between higher physical activity and preventive effect on breast-cancer-related lymphoedema (BCRL) has been reported, it is unclear what intervention is optimal. We aimed to investigate the effect of exercise and educational programs on BCRL development. METHODS: This study was a secondary endpoint analysis from a prospective randomized controlled trial. We enrolled patients with stage 0-III breast cancer from March 2016 to March 2020 and randomly assigned them to the control (n = 111), education (n = 115), or exercise (n = 104) group. As secondary endpoint, we assessed the incidence of and preventive effect on BCRL at 12 months post-intervention. RESULTS: There were no significant differences in the incidence of BCRL at 12 months post-intervention between the exercise and control groups (9.8% and 10.8%, P = 0.83) and the education and control groups (11.6% and 10.8%, P = 1.00). There were no significant differences in time to BCRL onset from the day of surgery between the exercise and control groups (event rate at 12 months: 20.7% and 17.2%, log-rank, P = 0.54) and the education and control groups (18.8% and 17.2%, log-rank, P = 0.57). The multivariable analyses indicated that axillary dissection and obesity significantly increased the risk of BCRL [hazard ratio (HR): 2.36, 95% confidence interval (CI) 1.52-3.67 and HR: 1.68, 95% CI 1.07-2.63, respectively]. CONCLUSIONS: The intervention did not decrease the risk of BCRL, and axillary dissection and obesity were the risk factors of BCRL. TRIAL REGISTRATION NUMBER: UMIN000020595 at UMIN Clinical Trial Registry.

DOI： 10.1007/s12282-024-01610-5

【乳癌学2024(下)-最新の診断と治療-】わが国の臨床試験の現状と今後の展望乳癌臨床試験参加のすゝめ

枝園忠彦, 突沖貴宏, 高橋侑子, 岩谷胤生

日本臨床 82 ( 増刊7 乳癌学2024(下) ) 249 - 254 2024年9月

Status of incremental costs of first-line treatment recommended in Japanese clinical guidelines for metastatic breast cancer patients 査読

Tsuguo Iwatani, Keita Sasaki, Ryunosuke Machida, Tadahiko Shien, Fumikata Hara, Tomomi Fujisawa, Yuko Takano, Yoshie Kobayashi, Michiyo Saimura, Kei Koizumi, Mitsuo Terada, Shinsuke Sasada, Kanako Saito, Miwa Sumiyoshi, Hiroji Iwata

Japanese Journal of Clinical Oncology 2024年8月

掲載種別：研究論文（学術雑誌）出版者・発行元：Oxford University Press (OUP)

Abstract

Background

The increasing incidence and prevalence of breast cancer alongside diagnostic and treatment technology advances have produced a debate about the financial burden cancer places on the healthcare system and concerns about access.

Methods

This study was conducted at 51 hospitals belonging to the Breast Cancer Study Group of the Japan Clinical Oncology Group using a web-based survey. The survey period conducted from July 2021 to June 2022. The study population included patients with metastatic breast cancer who received the related treatment as their first-line therapy. The proportion of patients who selected that regimen as their first-line treatment was tabulated. The total cost increase for each current standard therapy in comparison to conventional treatments was calculated.

Results

A total of 702 patients (pts) were surveyed. Of those enrolled, 342 (48.7%) received high-cost treatment [estimated monthly drug costs exceeding ~500 000 Japanese Yen (JPY)]. Of these, 16 pts (4.7%) were receiving very high-cost treatment, amounting to more than 1 000 000 JPY per month. Fifty three (15.5%) of the patients who received high-cost treatment were 75 years of age or older. Of these, 1 pt (0.3%) were receiving very high-cost treatment. Analyses of incremental costs by current drugs showed that abemaciclib was costly with total additional cost of 6 365 670 JPY per patient. The total additional cost of the regimen per patient that included palbociclib was the second highest at 4011248 JPY, followed by atezolizumab at 3209033 JPY.

Conclusions

The findings indicate that evaluating the financial implications of high-cost treatments requires considering not only drug prices but also analysis of total cost increase.

DOI： 10.1093/jjco/hyae109

術前薬物療法後病理学的完全奏効到達症例における早期遠隔再発症例の検討

高橋侑子, 三又明日香, 中本翔伍, 岩谷陽子, 突沖貴宏, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 297 - 297 2024年7月

転移再発乳癌におけるがんゲノムプロファイリングの現状と問題点がん遺伝子パネル検査の前向き観察研究(REIWA study)の中間解析結果と乳癌ゲノム医療の問題点

多田寛, 増田紘子, 安立弥生, 岩谷胤生, 上本康明, 大谷陽子, 梶原友紀子, 北川大, 古川孝広, 相良安昭, 枝園忠彦, 田辺裕子, 谷岡真樹, 原文堅, 八十島宏行, 服部正也, 吉村健一, 岩田広治, 増田慎三

日本乳癌学会総会プログラム抄録集 32回 25 - 25 2024年7月

多様な背景を持つ乳癌患者の意思決定支援 LGBTに対する乳癌診療の事例報告

枝園忠彦, 染田朋子, 露無祐子, 三又明日香, 間森智花, 中本翔吾, 岩谷陽子, 突沖貴宏, 高橋侑子, 岩谷胤生, 谷岡真樹

日本乳癌学会総会プログラム抄録集 32回 29 - 29 2024年7月

当院における乳腺葉状腫瘍の正診率と再発率の検討

中本翔伍, 突沖貴宏, 三又明日香, 高橋侑子, 岩谷陽子, 岩谷胤生, 谷岡真樹, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 407 - 407 2024年7月

重篤な薬剤性心不全にて長期入院加療を要した2症例の検討

間森智加, 突沖貴宏, 三又明日香, 中本翔伍, 岩谷陽子, 高橋侑子, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 480 - 480 2024年7月

BRCA病的バリアントを有する乳癌患者における術前化学療法に対する治療奏効率の検討

三又明日香, 高橋侑子, 中本翔伍, 突沖貴宏, 岩谷陽子, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 289 - 289 2024年7月

Nipple-areolar complex malposition in breast reconstruction after nipple-sparing mastectomy: a multi-institutional retrospective observational study in Japan. 査読

Sayuri Kato, Hiroki Mori, Miho Saiga, Satoko Watanabe, Shinsuke Sasada, Ayano Sasaki, Akiko Ogiya, Mao Yamamoto, Kazutaka Narui, Junji Takano, Hirohito Seki, Naomi Nagura, Makoto Ishitobi, Tadahiko Shien

Breast cancer (Tokyo, Japan) 31 ( 4 ) 649 - 658 2024年7月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Position of the nipple-areolar complex (NAC) is an important factor in the esthetic impression of the breast, and NAC malposition is often an issue in breast reconstruction after nipple-sparing mastectomy (NSM). The purpose of this study was to evaluate the degree of NAC malposition depending on several factors using data quantified with the Mamma Balance application (Medic Engineering K.K., Kyoto, Japan). METHODS: Patients who underwent unilateral breast reconstruction after NSM at eight hospitals in Japan between 2007 and 2020 were retrospectively investigated. Using Mamma Balance, NAC malposition was quantified separately in horizontal and vertical directions using patient photographs from pre-operatively and 6-24 months post-operatively. The degree of malpositioning was then statistically compared using various factors. RESULTS: The NAC deviated more cranially and medially with implants than that with flaps. Cases with latissimus dorsi flap showed lateral malposition more often than cases with deep inferior epigastric artery perforator flap. With flaps, lateral incisions showed more lateral malposition, and peri-areolar incisions tended to show more medial NAC malposition. In cases with severe post-operative infection of the implant, the NAC tended to deviate cranially. In radiation cases, the NAC deviated cranially. No significant difference was observed according to the degree of breast ptosis or use of the pull-down operation. Only a very weak correlation was observed between a larger amount of mastectomy and more cranial NAC malposition with both flaps and implants. CONCLUSIONS: This study provides insights into the tendencies and characteristics of NAC malposition.

DOI： 10.1007/s12282-024-01578-2

転移再発乳癌におけるがんゲノムプロファイリングの現状と問題点がん遺伝子パネル検査の前向き観察研究(REIWA study)の中間解析結果と乳癌ゲノム医療の問題点

多田寛, 増田紘子, 安立弥生, 岩谷胤生, 上本康明, 大谷陽子, 梶原友紀子, 北川大, 古川孝広, 相良安昭, 枝園忠彦, 田辺裕子, 谷岡真樹, 原文堅, 八十島宏行, 服部正也, 吉村健一, 岩田広治, 増田慎三

日本乳癌学会総会プログラム抄録集 32回 25 - 25 2024年7月

多様な背景を持つ乳癌患者の意思決定支援 LGBTに対する乳癌診療の事例報告

枝園忠彦, 染田朋子, 露無祐子, 三又明日香, 間森智花, 中本翔吾, 岩谷陽子, 突沖貴宏, 高橋侑子, 岩谷胤生, 谷岡真樹

日本乳癌学会総会プログラム抄録集 32回 29 - 29 2024年7月

乳房部分切除後の温存乳房内再発時の手術術式選択に関する患者意向について

瀬戸友希子, 石飛真人, 枝園忠彦, 大城智弥, 井上寛章, 島宏彰, 久芳さやか, 渡邉法之, 岩谷胤生, 中山貴寛

日本乳癌学会総会プログラム抄録集 32回 261 - 261 2024年7月

BRCA病的バリアントを有する乳癌患者における術前化学療法に対する治療奏効率の検討

三又明日香, 高橋侑子, 中本翔伍, 突沖貴宏, 岩谷陽子, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 289 - 289 2024年7月

術前薬物療法後病理学的完全奏効到達症例における早期遠隔再発症例の検討

高橋侑子, 三又明日香, 中本翔伍, 岩谷陽子, 突沖貴宏, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 297 - 297 2024年7月

当院における乳腺葉状腫瘍の正診率と再発率の検討

中本翔伍, 突沖貴宏, 三又明日香, 高橋侑子, 岩谷陽子, 岩谷胤生, 谷岡真樹, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 407 - 407 2024年7月

重篤な薬剤性心不全にて長期入院加療を要した2症例の検討

間森智加, 突沖貴宏, 三又明日香, 中本翔伍, 岩谷陽子, 高橋侑子, 谷岡真樹, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 32回 480 - 480 2024年7月

Comparison of proportions and prognostic impact of pathological complete response between evaluations of representative specimen and total specimen in primary breast cancer after neoadjuvant chemoradiotherapy: an ancillary study of JCOG0306. 査読国際誌

Tadahiko Shien, Hitoshi Tsuda, Keita Sasaki, Junki Mizusawa, Futoshi Akiyama, Masafumi Kurosumi, Masataka Sawaki, Nobuko Tamura, Kiyo Tanaka, Takahiro Kogawa, Mina Takahashi, Naoki Hayashi, Hirofumi Mukai, Norikazu Masuda, Fumikata Hara, Hiroji Iwata

Breast cancer research and treatment 2024年6月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: In JCOG0306 trial, a phase II study to examine the efficacy of neoadjuvant chemotherapy followed by radiation therapy (NAC-RT) to primary breast cancer, pathological complete response (pCR) was evaluated from specimens of the representative cross-section including the tumor center that had been accurately marked [representative specimen (RS) method]. In this ancillary study, we examined if the RS method was comparable to the conventional total specimen (TS) method, which is widely employed in Japan, to identify the pCR group showing excellent prognosis. METHODS: We obtained long-term follow-up data of 103 patients enrolled in JCOG0306 trial. As histological therapeutic effect, pCR (ypT0 and ypT0/is) and quasi-pCR [QpCR, ypT0/is plus Grade 2b (only a few remaining invasive cancer cells)] were evaluated with RS and TS methods. Concordance of pCR between these two methods and associations of the pCR with prognosis were examined. RESULTS: ypT0, ypT0/is, and QpCR were observed in 28 (27.2%), 39 (37.9%), and 45 (43.7%) patients with RS method, whereas these were 20 (19.4%), 25 (24.3%) and 40 (38.9%) with TS method, respectively. Between RS and TS methods, concordance proportions of ypT0 and ypTis were 92.2% and 86.4%, respectively. Risk of recurrence of ypT0/is group was lower than that of non-ypT0/is group (HR 0.408, 95% CI [0.175-0.946], P = 0.037) and risk of death of ypT0/is group was lower than that of non-ypT0/is group (HR 0.251, 95% CI [0.073-0.857], P = 0.027). The ypT0 and ypT0/is groups with RS method showed excellent prognosis similarly with those with TS method, and RS method was able to differentiate the OS and RFS between pCR and non-pCR than TS method significantly even if pCR was classified ypT0 or ypT0/is. With TS method, QpCR criteria stratified patients into the better and worse prognosis groupsmore clearly than pCR criteria of ypT0 or ypT0/is. CONCLUSIONS: RS method was comparable to TS method for the evaluation of pCR in the patients who received NAC-RT to primary breast cancer provided the tumor center was accurately marked. As pCR criteria with RS method, ypT0/is appeared more appropriate than ypT0.

DOI： 10.1007/s10549-024-07408-5

Baseline gut microbiota as a predictive marker for the efficacy of neoadjuvant chemotherapy in patients with early breast cancer: a multicenter prospective cohort study in the Setouchi Breast Project-14. 査読国際誌

Shogo Nakamoto, Yukiko Kajiwara, Kohei Taniguchi, Akira I Hida, Yuichiro Miyoshi, Takanori Kin, Mari Yamamoto, Daisuke Takabatake, Shinichiro Kubo, Hajime Hikino, Yutaka Ogasawara, Masahiko Ikeda, Hiroyoshi Doihara, Tadahiko Shien, Naruto Taira, Takayuki Iwamoto, Shinichi Toyooka

Breast cancer research and treatment 2024年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Various studies have demonstrated the causal relationship between gut microbiota and efficacy of chemotherapy; however, the impact of gut microbiota on breast cancer has not been fully elucidated. This study aimed to evaluate the associations between the gut microbiota before neoadjuvant chemotherapy and its consequent efficacy in breast cancer. METHODS: This prospective observational study included patients who received neoadjuvant chemotherapy for primary early breast cancer at eight institutions between October 1, 2019, and March 31, 2022. We performed 16S rRNA analysis of fecal samples and α and β diversity analyses of the gut microbiota. The primary endpoint was the association between the gut microbiota and pathological complete response (pCR) to neoadjuvant chemotherapy. RESULTS: Among the 183 patients, the pCR rate after neoadjuvant chemotherapy was 36.1% in all patients and 12.9% (9/70), 69.5% (41/59), and 29.6% (16/54) in those with the luminal, human epidermal growth factor receptor 2, and triple-negative types, respectively. The α diversity of the gut microbiota did not significantly differ between patients with pCR and those without pCR. Among the gut microbiota, two species (Victivallales, P = 0.001 and Anaerolineales, P = 0.001) were associated with pCR, and one (Gemellales, P = 0.002) was associated with non-pCR. CONCLUSION: Three species in the gut microbiota had potential associations with neoadjuvant chemotherapy efficacy, but the diversity of the gut microbiota was not associated with response to chemotherapy. Further research is needed to validate our findings.

DOI： 10.1007/s10549-024-07395-7

Impact of radiation therapy for breast cancer with involved surgical margin after immediate breast reconstruction: A multi-institutional observational study. 査読国際誌

Shinsuke Sasada, Naomi Nagura, Ayaka Shimo, Akiko Ogiya, Miho Saiga, Hirohito Seki, Hiroki Mori, Naoto Kondo, Makoto Ishitobi, Kazutaka Narui, Hiroko Nogi, Chikako Yamauchi, Teruhisa Sakurai, Tadahiko Shien

European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 50 ( 6 ) 108360 - 108360 2024年6月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: Involved surgical margins are risk factors for local recurrence and re-excision is often difficult, particularly in patients with breast cancer undergoing immediate breast reconstruction (IBR). However, the magnitude of the effect of radiation therapy on preventing local recurrence for breast cancers with involved margins has not been sufficiently assessed. MATERIALS AND METHODS: We retrospectively assessed sites of involved surgical margins and local recurrence after mastectomy with IBR in patients with early breast cancer between 2008 and 2016. The effect of postoperative radiation therapy was evaluated in patients with involved margins, adjusted for nuclear grade, lymphatic invasion, surgical procedures, and primary systemic therapy. RESULTS: A total of 274 (5.8 %) out of 4726 patients who underwent mastectomy with IBR had involved surgical margins: 133, 68, 88, and 26 had involvement of the skin, deep margin, lateral margins, and nipple, respectively (including duplicates). Radiation therapy was administered to 54 patients with involved margins. In patients with involved margins, 7-year cumulative incidences of local recurrence were 1.9 % and 12.6 % with and without radiation therapy, respectively (adjusted hazard ratio, 0.17; 95 % CI, 0.04-0.80). Local recurrence occurred in 28 patients, and the sites were skin, subcutaneous tissue, muscle, and nipple-areola complex in 7, 17, 1, and 3 patients, respectively. Among them, 23 (82.1 %) were associated with involved margin sites. CONCLUSIONS: Radiation therapy meaningfully reduced the incidence of local recurrence in patients with breast cancer with margin involvement after mastectomy with IBR. Most local recurrences occurred at involved margin-related sites.

DOI： 10.1016/j.ejso.2024.108360

Receptor discordance after nipple-sparing mastectomy. 国際誌

Rena Kojima, Makoto Ishitobi, Naomi Nagura, Ayaka Shimo, Hirohito Seki, Akiko Ogiya, Teruhisa Sakurai, Yukiko Seto, Shinsuke Sasada, Chiya Oshiro, Michiko Kato, Takahiko Kawate, Naoto Kondo, Tadahiko Shien

Surgery in practice and science 17 100239 - 100239 2024年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Recent studies have shown that receptor status of breast cancer change between primary tumor and recurrence, which may influence treatment strategy and prognosis, but there are few reports on receptor discordance between primary tumors and local recurrence (LR) after nipple-sparing mastectomy (NSM). PATIENTS AND METHODS: We collected 74 patients who had LR after NSM for newly diagnosed stages 0 to 3 breast cancer between 2008 and 2016 at 14 institutions. We classified into 4 subtypes based on hormone receptor (HR) and human epidermal growth factor receptor 2 (HER2). We evaluated clinicopathological factors that correlate with receptor discordance and assessed the impact of receptor discordance on survival. RESULTS: Discordance rates in estrogen receptor (ER), progesterone receptor (PgR) and HER2 were 9.5, 10.8 and 5.4 %, respectively. The most common change was from HR-/HER2+ to HR+/HER2+, and this pattern of receptor change occurred only in patients with nipple-areolar recurrence. Non-invasive tumors in LR, nipple-areolar recurrence (NAR), HR-/HER2+ primary tumor subtype, and the presence of chemotherapy for primary tumors were significantly associated with receptor discordance. With a median follow-up of 44.5 months (4-153 months), patients in the receptor-discordant group had no disease-free survival (DFS) event after LR resection (5-year DFS; 100 % in the receptor-discordant group vs 85.1 % in the receptor-concordant group; p = 0.2). CONCLUSION: Our study demonstrates that the presence of chemotherapy for primary tumors, nipple-areolar recurrence, and its related factors (non-invasive tumor in LR, HR-/HER2+ primary tumor subtype) were associated with receptor discordance. However, further studies with longer follow-up periods and larger sample sizes are needed.

DOI： 10.1016/j.sipas.2024.100239

The specific shapes of capillaries are associated with worse prognosis in patients with invasive breast cancer. 査読国際誌

Hnin-Wint-Wint Swe, Masayoshi Fujisawa, Toshiaki Ohara, Yu Komatsubara, Teizo Yoshimura, Tadahiko Shien, Akihiro Matsukawa

Pathology international 2024年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

Angiogenesis is considered essential for tumor progression; however, whether histological counting of blood vessel numbers, expressed as microvessel density (MVD), can be a prognostic factor in breast cancer remains controversial. It has been suggested that the specific morphology of blood vessels such as glomeruloid microvascular proliferation (GMP) is associated with clinical parameters. Here, we aimed to clarify the significance of MVD with revised immunohistochemistry and to identify new blood vessel shapes that predict prognosis in breast cancer. Four hundred and eleven primary breast cancer specimens were collected, and the sections were immunohistochemically stained with CD31 (single staining) and CD31 and Collagen IV (double staining). The prognosis of patients was examined based on the MVD value, and the presence of GMP and other blood vessels with other specific shapes. As a result, high MVD value and the presence of GMP were not associated with worse prognosis. By contrast, patients with deep-curved capillaries surrounding tumor cell nests (C-shaped) or excessively branched capillaries near tumor cell nests showed a significantly poor prognosis. The presence of these capillaries was also correlated with clinicopathological parameters such as Ki-67 index. Thus, the morphology of capillaries rather than MVD can be a better indicator of tumor aggressiveness.

DOI： 10.1111/pin.13442

ASO Visual Abstract: Patient Preference for Surgical Methods for Ipsilateral Breast Tumor Recurrence. 査読国際誌

Yukiko Seto, Makoto Ishitobi, Tadahiko Shien, Chiya Oshiro, Hiroaki Inoue, Hiroaki Shima, Sayaka Kuba, Noriyuki Watanabe, Tsuguo Iwatani, Takahiro Nakayama

Annals of surgical oncology 2024年5月

Impact of neoadjuvant chemotherapy on the safety and long-term outcomes of patients undergoing immediate breast reconstruction after mastectomy. 査読

Hiroko Nogi, Akiko Ogiya, Makoto Ishitobi, Chikako Yamauchi, Hiroki Mori, Ayaka Shimo, Kazutaka Narui, Naomi Nagura, Hirohito Seki, Shinsuke Sasada, Teruhisa Sakurai, Tadahiko Shien

Breast cancer (Tokyo, Japan) 31 ( 3 ) 507 - 518 2024年5月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: In breast cancer patients receiving neoadjuvant chemotherapy (NAC), immediate breast reconstruction (IBR) as a breast cancer treatment option remains controversial. We assessed the impact of NAC on surgical and oncological outcomes of patients undergoing IBR. METHODS: This was a retrospective multicenter study of 4726 breast cancer cases undergoing IBR. The rate of postoperative complications and survival data were compared between IBR patients who received NAC and those who did not receive NAC. Propensity score matching analysis was performed to mitigate selection bias for survival. RESULTS: Of the total 4726 cases, 473 (10.0%) received NAC. Out of the cases with NAC, 96 (20.3%) experienced postoperative complications, while 744 cases (17.5%) without NAC had postoperative complications. NAC did not significant increase the risk of complications after IBR (Odds ratio, 0.96; 95%CI 0.74-1.25). At the median follow-up time of 76.5 months, 36 patients in the NAC group and 147 patients in the control group developed local recurrences. The 5-year local recurrence-free survival rate was 93.1% in the NAC group and 97.1% in the control group. (P < 0.001). After matching, there was no significant difference between the two groups. CONCLUSION: IBR after NAC is a safe procedure with an acceptable postoperative complication profile.

DOI： 10.1007/s12282-024-01570-w

Absolute lymphocyte count and neutrophil-to-lymphocyte ratio as predictors of CDK 4/6 inhibitor efficacy in advanced breast cancer. 査読国際誌

Shogo Nakamoto, Tadahiko Shien, Takayuki Iwamoto, Shinichiro Kubo, Mari Yamamoto, Tetsumasa Yamashita, Chihiro Kuwahara, Masahiko Ikeda

Scientific reports 14 ( 1 ) 9869 - 9869 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Cyclin-dependent kinase 4 and 6 inhibitors (CDK4/6i) are the standard agents for treating patients with estrogen receptor-positive and human epidermal growth factor receptor 2-negative advanced breast cancer (ER + HER2 - ABC). However, markers predicting the outcomes of CDK4/6i treatment have yet to be identified. This study was a single-center retrospective cohort study. We retrospectively evaluated 101 patients with ER + HER2 - ABC receiving CDK4/6i in combination with endocrine therapy at Fukuyama City Hospital between November 2017 and July 2021. We investigated the clinical outcomes and the safety of CDK4/6i treatment, and the absolute lymphocyte count (ALC) and neutrophil-to-lymphocyte ratio (NLR) as predictive markers for CDK4/6i. We defined the cut-off values as 1000/μL for ALC and 3 for NLR, and divided into "low" and "high" groups, respectively. We evaluated 43 and 58 patients who received abemaciclib and palbociclib, respectively. Patients with high ALC and low NLR had significantly longer overall survival than those with low ALC and high NLR (high vs. low; ALC: HR 0.29; 95% CI 0.12-0.70; NLR: HR 2.94; 95% CI 1.21-7.13). There was no significant difference in efficacy between abemaciclib and palbociclib and both had good safety profiles. We demonstrated that ALC and NLR might predict the outcomes of CDK4/6i treatment in patients with ER + HER2 - ABC.

DOI： 10.1038/s41598-024-60101-x

Adrenergic microenvironment driven by cancer-associated Schwann cells contributes to chemoresistance in patients with lung cancer. 査読国際誌

Yusuke Otani, Haruyoshi Katayama, Yidan Zhu, Rongsheng Huang, Takafumi Shigehira, Kazuhiko Shien, Ken Suzawa, Hiromasa Yamamoto, Tadahiko Shien, Shinichi Toyooka, Atsushi Fujimura

Cancer science 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Doublecortin (DCX)-positive neural progenitor-like cells are purported components of the cancer microenvironment. The number of DCX-positive cells in tissues reportedly correlates with cancer progression; however, little is known about the mechanism by which these cells affect cancer progression. Here we demonstrated that DCX-positive cells, which are found in all major histological subtypes of lung cancer, are cancer-associated Schwann cells (CAS) and contribute to the chemoresistance of lung cancer cells by establishing an adrenergic microenvironment. Mechanistically, the activation of the Hippo transducer YAP/TAZ was involved in the acquisition of new traits of CAS and DCX positivity. We further revealed that CAS express catecholamine-synthesizing enzymes and synthesize adrenaline, which potentiates the chemoresistance of lung cancer cells through the activation of YAP/TAZ. Our findings shed light on CAS, which drive the formation of an adrenergic microenvironment by the reciprocal regulation of YAP/TAZ in lung cancer tissues.

DOI： 10.1111/cas.16164

Patient Preference for Surgical Methods for Ipsilateral Breast Tumor Recurrence. 査読国際誌

Yukiko Seto, Makoto Ishitobi, Tadahiko Shien, Chiya Oshiro, Hiroaki Inoue, Hiroaki Shima, Sayaka Kuba, Noriyuki Watanabe, Tsuguo Iwatani, Takahiro Nakayama

Annals of surgical oncology 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Mastectomy has been the standard surgical treatment for ipsilateral breast tumor recurrence (IBTR). Recently, there has been growing interest in repeat breast-conserving surgery (rBCS) for IBTR among breast surgeons; however, there is currently little information regarding patient preferences for surgical procedure for IBTR. The purpose of this study was to evaluate preference for surgical procedure (mastectomy vs. rBCS) among breast cancer patients who had undergone salvage surgery for IBTR. METHODS: Overall, 100 breast cancer patients who had undergone salvage surgery for IBTR were asked about their preferred surgical methods for IBTR and the reason. The association of patient preference and the reasons related to various clinical and pathological factors were assessed. RESULTS: Of the 100 respondents, only 11 patients (11%) preferred rBCS. Patients who had undergone rBCS and radiotherapy for IBTR were significantly more likely to prefer to undergo rBCS than other groups (p = 0.030). The most frequent reason for choosing rBCS was the patient's desire to minimize breast deformity and surgical wounds. CONCLUSIONS: Our study revealed that there is a low rate of patients who opt to undergo rBCS among patients who had undergone salvage surgery for IBTR. Discrepancies in perceptions regarding the surgical procedure for IBTR between patients and their surgeons may exist.

DOI： 10.1245/s10434-024-15282-0

乳癌領域外科治療の個別化 de-novo Stage IV乳がんに対する原発巣切除について残されたCQと次の展開

枝園忠彦, 岡美苗, 中山恵利香, 三又明日香, 桑原ちひろ, 間森智加, 中本翔吾, 突沖貴宏, 高橋侑子, 岩谷胤生

日本外科学会定期学術集会抄録集 124回 WS - 7 2024年4月

内分泌外科領域における米国式手術手技評価法を用いた専門医養成の取り組み Operative Performance Rating Scale日本語版の作成

岩谷胤生, 突沖貴宏, 高橋侑子, 枝園忠彦

日本内分泌外科学会雑誌 41 ( Suppl.1 ) S204 - S204 2024年4月

内分泌外科領域における米国式手術手技評価法を用いた専門医養成の取り組み Operative Performance Rating Scale日本語版の作成

岩谷胤生, 突沖貴宏, 高橋侑子, 枝園忠彦

日本内分泌外科学会雑誌 41 ( Suppl.1 ) S204 - S204 2024年4月

乳癌領域外科治療の個別化 de-novo Stage IV乳がんに対する原発巣切除について残されたCQと次の展開

枝園忠彦, 岡美苗, 中山恵利香, 三又明日香, 桑原ちひろ, 間森智加, 中本翔吾, 突沖貴宏, 高橋侑子, 岩谷胤生

日本外科学会定期学術集会抄録集 124回 WS - 7 2024年4月

外科と救急のダブルボード取得を目指した外科救急連携コース

黒田新士, 安井和也, 岡崎幹生, 小谷恭弘, 枝園忠彦, 小林純子, 中尾篤典, 笠原真悟, 豊岡伸一, 藤原俊義

日本外科学会定期学術集会抄録集 124回 SP - 6 2024年4月

自壊を来たした乳腺巨大葉状腫瘍の1例

藤原亮太, 突沖貴宏, 三又明日香, 高橋侑子, 岩谷陽子, 岩谷胤生, 枝園忠彦

日本臨床外科学会雑誌 85 ( 3 ) 460 - 460 2024年3月

自壊を来たした乳腺巨大葉状腫瘍の1例

藤原亮太, 突沖貴宏, 三又明日香, 高橋侑子, 岩谷陽子, 岩谷胤生, 枝園忠彦

日本臨床外科学会雑誌 85 ( 3 ) 460 - 460 2024年3月

Ectopic Breast Cancer Arising within an Axillary Lymph Node. 査読

Kei Toshima, Tadahiko Shien, Midori Filiz Nishimura, Yoko Suzuki, Shogo Nakamoto, Maya Uno, Ryo Yoshioka, Takahiro Tsukioki, Yuko Takahashi, Takayuki Iwamoto, Tsuguo Iwatani, Hiroyuki Yanai

Acta medica Okayama 78 ( 1 ) 89 - 93 2024年2月

担当区分：責任著者記述言語：英語

We report our experience with the diagnosis and treatment of an ectopic breast cancer arising within an axillary lymph node. The patient was a 65-year-old woman diagnosed breast cancer and axillary lymph node metastasis. We performed a partial mastectomy and axillary lymph node dissection. Postoperative pathology revealed no malignant lesions in the breast; however, a nodule in one of axillary lymph nodes had mixed benign and malignant components, leading to a diagnosis of invasive ductal carcinoma derived from ectopic mammary tissue. This case represents a very rare form of breast cancer, and the malignancy was difficult to distinguish from metastasis.

DOI： 10.18926/AMO/66676

Lung Oligometastasis of Breast Cancer: Prospective Cohort Study of Treatment Strategies (SBP-06). 査読

Reina Maeda, Tadahiko Shien, Mina Takahashi, Kengo Kawada, Yukiko Kajiwara, Shinichiro Kubo, Daisuke Takabatake, Shoichiro Ohtani, Kinya Matsuoka, Hajime Hikino, Yutaka Ogasawara, Naruto Taira, Shozo Osumi, Masahiko Ikeda, Hiroyoshi Doihara

Acta medica Okayama 78 ( 1 ) 15 - 20 2024年2月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

While local treatment of metastases is considered to be unrelated to prognosis, previous studies have suggested that local treatment of isolated lung metastases may have positive prognostic impact. We designed this prospective cohort study to investigate the clinical situation and its outcomes. We enrolled patients with fewer than 3 lung nodules suspected of being oligometastases after curative breast cancer surgery. Treatments, including local and systemic therapy, were selected by the physician and patient in consultation. The primary outcome was overall survival (OS); secondary outcomes were the efficacy and the safety of the surgery for lung oligometastases. Between May 2015 and May 2019, 14 patients were enrolled. Resection of lung nodules (metastasectomy) was performed in 11 (78.6%) of 14 patients, and one of these cases was diagnosed as primary lung cancer. Metastasectomies were all performed employing video-assisted thoracic surgery (VATS) without perioperative complications. Systemic therapies were administered to all patients except one. The respective 3-year and 5-year OS rates of patients with lung oligometastases were 91.6% and 81.5%, respectively. Progression occurred in 6 patients: 3 of the 10 with metastasectomy and all 3 without this surgical procedure. Lung metastasectomy was worthwhile as a diagnostic evaluation and may provide long-term benefit in some patients.

DOI： 10.18926/AMO/66666

Pilot trial of an electronic patient-reported outcome monitoring system in patients with metastatic breast cancer undergoing chemotherapy. 査読

Naruto Taira, Yuichiro Kikawa, Takayuki Iwamoto, Yuichiro Miyoshi, Kyoko Hara, Seiji Yoshitomi, Hajime Hikino, Hirotoshi Takahashi, Daisuke Takabatake, Shinichiro Kubo, Masahiko Ikeda, Hiroyoshi Doihara, Tadahiko Shien, Hiromi Okuyama, Yuko Tanabe, Fumikata Hara, Kosho Yamanouchi, Yasuhiro Hagiwara, Masataka Sawaki

Breast cancer (Tokyo, Japan) 31 ( 2 ) 283 - 294 2024年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Electronic patient-reported outcomes monitoring (ePROM) is a useful communication tool for patients and healthcare providers in cancer chemotherapy. In this study, we examined the feasibility of our newly developed ePROM system, which we refer to as "Hibilog". METHODS: An ePROM app was developed by extracting 18 items from the Patient-Reported Outcome-Common Terminology Criteria for Adverse Events (PRO-CTCAE). Symptom monitoring was conducted every two weeks for patients with metastatic breast cancer undergoing chemotherapy. The primary outcome was the response rate to the ePROM system. The secondary outcomes were response time, item missing rate, and distribution of responses for each symptom. RESULTS: A total of 71 cases (mean age 52.6 years) were analyzed. Performance status was 0 in 76% of the cases and 1 or higher in 24%. First-line treatment was being administered in 30% of cases, second-line treatment in 17%, and third-line or higher treatment in 53%. The response rate to the ePROM system from registration to week 40 remained high at around 80%, indicating good compliance. The average response time was 5.5 min and the missing rate for each item was below 0.4%. Among 1,093 responses, the top 3 symptoms causing interference with daily life were Fatigue (63%), Numbness and tingling (48%), and General pain (46%). CONCLUSION: Our developed ePROM system was able to capture symptoms accurately in patients with metastatic breast cancer undergoing chemotherapy while maintaining a high response compliance.

DOI： 10.1007/s12282-023-01537-3

Current status and challenges of breast cancer prevention~DNA methylation would lead to groundbreaking progress in breast cancer prevention~. 査読国際誌

Takahiro Tsukioki, Seema A Khan, Tadahiko Shien

Genes and environment : the official journal of the Japanese Environmental Mutagen Society 45 ( 1 ) 35 - 35 2023年12月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

The number of breast cancer patients is increasing worldwide. Furthermore, breast cancer often develops in young people, even those only in their 30s, who play a central role in their families and society. Results from many cohort studies suggest that dietary factors, alcohol consumption, lack of physical activity, obesity, nulliparity, breastfeeding, oral contraceptive use, fertility treatment and hormone replacement therapy are risk factors for breast cancer. However, the effects of lifestyle habits on the human body are complexly intertwined with various factors, and the effects vary from person to person depending on their constitution, etc., so there is no basis for this. Therefore, primary prevention of breast cancer is still not being implemented appropriately and efficiently. Furthermore, advances in genomic technology make it possible to assess the risk of developing breast cancer in some individuals. As a result, the establishment of breast cancer prevention methods has become a health priority for high-risk individuals.Drugs such as tamoxifen and raloxifene are known to prevent the development of breast cancer, based on the results of multiple randomized controlled trials, but there are concerns regarding the side effects of these powerful agents. In addition, several clinical studies have shown that prophylactic mastectomy for women who have BRCA mutations or who are identified as being at high risk reduces the incidence of breast cancer development. However, many issues, such as changes in long-term quality of life after preventive surgery, the optimal timing of surgery and the identification of women who are at high risk but will not develop breast cancer, remain uncertain. In other words, although many researchers have focused on chemoprevention and surgical prevention and clear preventive effects of these strategies have been confirmed, it cannot be said that they are widely accepted. Therefore, the current evidence for chemoprevention and surgical prevention, as well as highlights of several interesting lines of research currently underway, are summarized in this article.

DOI： 10.1186/s41021-023-00287-0

Systemic immunity markers are associated with clinical outcomes of atezolizumab treatment in patients with triple-negative advanced breast cancer: a retrospective multicenter observational study. 査読国際誌

Shogo Nakamoto, Tadahiko Shien, Mitsuya Itoh, Yutaka Yamamoto, Shozo Ohsumi, Seiji Yoshitomi, Hajime Hikino, Kazuya Miyoshi, Akifumi Notsu, Naruto Taira, Hiroyoshi Doihara, Masahiko Ikeda

Clinical and experimental medicine 23 ( 8 ) 5129 - 5138 2023年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

Immune checkpoint inhibitors (ICI) are reportedly efficacious against triple-negative breast cancer (TNBC) and are now recommended as first-line therapy. Systemic immunity markers, the absolute lymphocyte count (ALC) and the neutrophil-to-lymphocyte ratio (NLR), have been identified as predict ICI efficacy in patients with various cancers. We retrospectively enrolled 36 TNBC patients who received atezolizumab treatment between September 2019 and May 2021 at eight Japanese medical institutions. We evaluated systemic immunity markers, including dynamic changes in these markers, as predictors of survival benefit derived from atezolizumab treatment. Median time-to-treatment failure (TTF) and overall survival (OS) were 116 days and "not reached", respectively. Patients with low NLR at baseline and decreased NLR at the start of the second cycle (SO2nd) had significantly longer OS than those with high NLR at baseline and increased NLR (SO2nd) (log-rank P < 0.001 and log-rank P = 0.049, respectively). Multivariate analyses identified high ALC at baseline and decreased NLR (SO2nd) as independent predictive markers for longer TTF (P = 0.043 and P = 0.002, respectively), and low NLR at baseline and decreased NLR (SO2nd) as independent predictive markers for longer OS (P < 0.001 and P = 0.013, respectively). The safety profile was consistent with those of previous trials. This retrospective multicenter observational study showed the clinical efficacy and safety of atezolizumab treatment. Furthermore, systemic immunity markers, including their dynamic changes, were found to be associated with clinical outcomes of atezolizumab treatment in patients with advanced or metastatic TNBC.

DOI： 10.1007/s10238-023-01230-x

多遺伝子パネル検査を用いて治療方針を決定した若年の非浸潤性乳管癌患者の一例

鈴木陽子, 岩谷胤生, 仁科卓也, 吉本皓一, 宇野摩耶, 中本翔伍, 高橋侑子, 突沖貴宏, 岩本高行, 伊波茂道, 平沢晃, 枝園忠彦

日本臨床外科学会雑誌 84 ( 11 ) 1830 - 1830 2023年11月

多遺伝子パネル検査を用いて治療方針を決定した若年の非浸潤性乳管癌患者の一例

鈴木陽子, 岩谷胤生, 仁科卓也, 吉本皓一, 宇野摩耶, 中本翔伍, 高橋侑子, 突沖貴宏, 岩本高行, 伊波茂道, 平沢晃, 枝園忠彦

日本臨床外科学会雑誌 84 ( 11 ) 1830 - 1830 2023年11月

The Japanese Breast Cancer Society Clinical Practice Guidelines for surgical treatment of breast cancer, 2022 edition. 査読

Takehiko Sakai, Goro Kutomi, Tadahiko Shien, Sota Asaga, Tomoyuki Aruga, Makoto Ishitobi, Sayaka Kuba, Masataka Sawaki, Kaori Terata, Koichi Tomita, Chikako Yamauchi, Yutaka Yamamoto, Hiroji Iwata, Shigehira Saji

Breast cancer (Tokyo, Japan) 2023年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

The 2022 revision of the Japanese Breast Cancer Society (JBCS) Clinical Practice Guidelines for surgical treatment of breast cancer was updated following a systematic review of the literature using the Medical Information Network Distribution Service (MINDS) procedure, which focuses on the balance of benefits and harms for various clinical questions (CQs). Experts in surgery designated by the JBCS addressed five areas: breast surgery, axillary surgery, breast reconstruction, surgical treatment for recurrent and metastatic breast cancer, and other related topics. The revision of the guidelines encompassed 4 CQs, 7 background questions (BQs), and 14 future research questions (FRQs). A significant revision in the 2022 edition pertained to axillary management after neoadjuvant chemotherapy in CQ2. The primary aim of the 2022 JBCS Clinical Practice Guidelines is to provide evidence-based recommendations to empower patients and healthcare professionals in making informed decisions regarding surgical treatment for breast cancer.

DOI： 10.1007/s12282-023-01510-0

Patients Offer Radiofrequency Ablation Therapy for Early Breast Cancer as Local Therapy (PO-RAFAELO) Study under the Patient-proposed Health Services. 査読

Shin Takayama, Takayuki Kinoshita, Sho Shiino, Kenjiro Jimbo, Ken-Ichi Watanabe, Tomomi Fujisawa, Naohito Yamamoto, Tatsuya Onishi, Tadahiko Shien, Mitsuya Ito, Mina Takahashi, Manabu Futamura, Tomoyuki Aruga, Koji Kaneko, Akihiko Suto

JMA journal 6 ( 4 ) 505 - 512 2023年10月

記述言語：英語

INTRODUCTION: Due to the increase in the number of early-stage breast cancer patients, there is growing interest in minimally invasive local therapies for breast cancer. Radiofrequency ablation (RFA) therapy is one of the most promising minimally invasive treatments. The Radiofrequency Ablation Therapy for Early Breast Cancer as Local Therapy (RAFAELO) study, a multicenter collaborative study that aims to validate the efficacy and safety of RFA and to standardize its use for early-stage breast cancer, was conducted under the Advanced Medical Care B system in 2013. This study enrolled the expected number of patients in November 2017; moreover, it is currently in the follow-up period. Some patients with early-stage breast cancer who are eligible for RFA could not receive the RFA treatment, as it is still not covered by insurance. Therefore, the Patients Offer Radiofrequency Ablation Therapy for Early Breast Cancer as Local Therapy (PO-RAFAELO) study under the Patient-proposed Health Services (PPHS) was proposed and approved in March 2019. METHODS: The PPHS is a system that allows patients to receive prompt access to advanced medical care at a medical facility close to them, starting with their request. This system is considered a part of the specific and special medical coverage. The PO-RAFAELO study is the only study in the surgical field utilizing the PPHS, aiming to help in achieving regulatory approval and insurance coverage of RFA for breast cancer. RESULTS: As of January 2023, 120 patients have undergone RFA using the PPHS and no grade 3 or higher early adverse events have occurred. CONCLUSIONS: A certain number of patients with early-stage breast cancer prefer nonsurgical treatment, and it is important to provide information regarding the availability of RFA for early-stage breast cancer under the PPHS.Trial registration: registered with Japan Registry of Clinical Trial on March 06, 2019 (Trial ID: jRCTs032180187).

DOI： 10.31662/jmaj.2023-0047

ASO Visual Abstract: Long-Term Outcomes of Breast Cancer Patients with Local Recurrence After Mastectomy Undergoing Immediate Breast Reconstruction-A Retrospective, Multi-institutional Study of 4153 Cases. 査読国際誌

Akiko Ogiya, Naomi Nagura, Ayaka Shimo, Hiroko Nogi, Kazutaka Narui, Hirohito Seki, Hiroki Mori, Shinsuke Sasada, Makoto Ishitobi, Naoto Kondo, Chikako Yamauchi, Kohei Akazawa, Tadahiko Shien

Annals of surgical oncology 30 ( 11 ) 6543 - 6544 2023年10月

ASO Author Reflections: Long Term Outcomes of Breast Cancer Patients with Local Recurrence After Mastectomy Undergoing Immediate Breast Reconstruction. 査読国際誌

Akiko Ogiya, Naomi Nagura, Ayaka Shimo, Hiroko Nogi, Kazutaka Narui, Hirohito Seki, Hiroki Mori, Shinsuke Sasada, Makoto Ishitobi, Naoto Kondo, Chikako Yamauchi, Kohei Akazawa, Tadahiko Shien

Annals of surgical oncology 30 ( 11 ) 6541 - 6542 2023年10月

Long-Term Outcomes of Breast Cancer Patients with Local Recurrence After Mastectomy Undergoing Immediate Breast Reconstruction: A Retrospective Multi-institutional Study of 4153 Cases. 査読国際誌

Akiko Ogiya, Naomi Nagura, Ayaka Shimo, Hiroko Nogi, Kazutaka Narui, Hirohito Seki, Hiroki Mori, Shinsuke Sasada, Makoto Ishitobi, Naoto Kondo, Chikako Yamauchi, Kohei Akazawa, Tadahiko Shien

Annals of surgical oncology 30 ( 11 ) 6532 - 6540 2023年10月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The number of breast cancer patients in Japan undergoing immediate breast reconstruction (IBR) has increased and the postoperative follow-up period has been extended. This study was conducted to clarify the clinical aspects of, and factors associated with, local recurrence (LR) after IBR. METHODS: This was a multicenter study which included 4153 early breast cancer patients who underwent IBR. Clinicopathological characteristics were examined and factors potentially contributing to LR were analyzed. Risk factors for LR were examined separately for non-invasive and invasive breast cancers. RESULTS: The median follow-up period was 75 months. The 7-year LR rates were 2.1% and 4.3% for non-invasive and invasive cancers, respectively (p < 0.001). The proportions of LR detected by palpation, subjective symptoms, and ultrasonography were 40.0%, 27.3%, and 25.9%, respectively. Overall, 75.7% of LR were solitary, and 92.7% of these cases had no further recurrences during the observational period. Multivariate analysis of LR for invasive cancer showed that skin-sparing mastectomy (SSM) or nipple-sparing mastectomy (NSM), the presence of lymphovascular invasion, cancer at the surgical margin, and not receiving radiation therapy were factors related to LR. The 7-year overall survival rates of the patients with LR and non-LR of invasive cancers were 92.5% and 97.3%, respectively, (p = 0.002). CONCLUSIONS: The rate of LR after IBR was acceptably low and IBR can thus be performed safely for early breast cancer patients. Invasive cancer, SSM/NSM, lymphovascular invasion, and/or cancer at the surgical margin should prompt awareness of the possibility of LR.

DOI： 10.1245/s10434-023-13832-6

ライフイベント時に本当に必要な支援とは? 高いチーム力でダイバーシティとインクルージョンを目指す当院のキャリア支援

小林純子, 竹原裕子, 溝尾妙子, 菊地覚次, 三好健太郎, 黒田新士, 田邊俊介, 楳田祐三, 小谷恭弘, 杉本誠一郎, 岡崎幹生, 枝園忠彦, 豊岡伸一, 藤原俊義, 笠原真悟

日本臨床外科学会雑誌 84 ( 増刊 ) S73 - S73 2023年10月

Prognostic impact of adjuvant endocrine therapy for estrogen receptor-positive and HER2-negative T1a/bN0M0 breast cancer. 査読国際誌

Shinsuke Sasada, Naoto Kondo, Hiroya Hashimoto, Yuko Takahashi, Kaori Terata, Kumiko Kida, Yasuaki Sagara, Takayuki Ueno, Keisei Anan, Akihiko Suto, Chizuko Kanbayashi, Mina Takahashi, Rikiya Nakamura, Toshiyuki Ishiba, Michiko Tsuneizumi, Seiichiro Nishimura, Yoichi Naito, Fumikata Hara, Tadahiko Shien, Hiroji Iwata

Breast cancer research and treatment 2023年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Mammography screening has increased the detection of subcentimeter breast cancers. The prognosis for estrogen receptor (ER)-positive and human epidermal growth factor receptor 2 (HER2)-negative T1a/bN0M0 breast cancers is excellent; however, the necessity of adjuvant endocrine therapy (ET) is uncertain. METHODS: We evaluated the effectiveness of adjuvant ET in patients with ER-positive and HER2-negative T1a/bN0M0 breast cancer who underwent surgery from 2008 to 2012. Standard ET was administrated after surgery. The primary endpoint was the cumulative incidence of distant metastasis. All statistical tests were 2-sided. RESULTS: Adjuvant ET was administered to 3991 (83%) of the 4758 eligible patients (1202 T1a [25.3%] and 3556 T1b [74.7%], diseases). The median follow-up period was 9.2 years. The 9-year cumulative incidence of distant metastasis was 1.5% with ET and 2.6% without ET (adjusted subdistribution hazard ratio [sHR], 0.54; 95% CI, 0.32-0.93). In multivariate analysis, the independent risk factors for distant metastasis were no history of ET, mastectomy, high-grade, and lymphatic invasion. The 9-year overall survival was 97.0% and 94.4% with and without ET, respectively (adjusted HR, 0.57; 95% CI, 0.39-0.83). In addition, adjuvant ET reduced the incidence of ipsilateral and contralateral breast cancer (9-year rates; 1.1% vs. 6.9%; sHR, 0.17, and 1.9% vs. 5.2%; sHR, 0.33). CONCLUSIONS: The prognosis was favorable in patients with ER-positive and HER2-negative T1a/bN0M0 breast cancer. Furthermore, adjuvant ET reduced the incidence of distant metastasis with minimal absolute risk difference. These findings support considering the omission of adjuvant ET, especially for patients with low-grade and no lymphatic invasion disease.

DOI： 10.1007/s10549-023-07097-6

乳癌術後乳房再建の現状と課題第26回日本乳癌学会班研究「乳房再建の安全性と予後に関する研究」全国アンケート調査査読

笹田伸介, 近藤直人, 石飛真人, 野木裕子, 山内智香子, 森弘樹, 荻谷朗子, 成井一隆, 名倉直美, 志茂彩華, 関大仁, 櫻井照久, 寺田かおり, 雜賀美帆, 枝園忠彦

乳癌の臨床 38 ( 4 ) 325 - 335 2023年8月

担当区分：最終著者記述言語：日本語出版者・発行元：(株)篠原出版新社

近年,乳癌診療の一部として乳房再建術が普及している.乳房再建の実態と周術期治療への影響を検討するため,大規模アンケート調査を行った.429施設より回答が得られ,乳房再建を提供している施設は73%であった.そのうち,自家組織を用いた乳房再建は75%,遊離皮弁を用いた乳房再建は48%の施設で実施されており,それぞれ形成外科医が2名以上,3名以上所属している施設が多かった.乳房再建が周術期治療に及ぼす影響は,化学療法は「変更なし」と回答した施設が94%であったのに対し,放射線療法は15%が「変更する」とし,適応症例や照射範囲を縮小する傾向があった.高度な技術を要する乳房再建術は複数の形成外科医を必要とし,周術期治療の変化が予後に与える影響を評価する必要がある.(著者抄録)

Development and validation of a symptom illustration scale from the patient-reported outcome common terminology criteria for adverse events for patients with breast cancer. 査読

Yoko Suzuki, Takayuki Iwamoto, Maya Uno, Minami Hatono, Yukiko Kajiwara, Yuko Takahashi, Mariko Kochi, Tadahiko Shien, Yuichiro Kikawa, Yukari Uemura, Yasuhiro Hagiwara, Seiichiro Yamamoto, Naruto Taira, Hiroyoshi Doihara, Shinichi Toyooka

Breast cancer (Tokyo, Japan) 30 ( 5 ) 856 - 868 2023年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Emojis are commonly used for daily communication and may be useful in assessing patient-reported outcomes (PROs) in breast cancer. The purpose of this study is to develop and validate a Symptom Illustration Scale (SIS) as a new PRO measurement. METHODS: Eighteen original SIS items were developed from the PRO-CTCAE. In cohort one, the SIS validity and reliability were examined in patients with breast cancer, using a semi-structured five-question survey to investigate content validity. PROs with PRO-CTCAE and SIS were examined twice to determine criteria validity and test-retest reliability. In cohort two, the responsiveness of the scales were examined in patients treated with anthracycline, docetaxel, paclitaxel, and endocrine therapy. PROs with PRO-CTCAE and SIS were investigated two or three times, depending on the therapy. RESULTS: Patients were enrolled from August 2019 to October 2020. In cohort one (n = 70), most patients had no difficulties with the SIS, but 16 patients indicated that it was difficult to understand severities in the SIS. For criterion validity, Spearman rank correlation coefficients (rs) between PRO-CTCAE and SIS items were ≥ 0.41, except for "Decreased appetite." For test-retest reliability, κ coefficients of the SIS were ≥ 0.41 for 16/18 items (88.9%). Response time was significantly shorter for the SIS than for PRO-CTCAE (p < 0.001). In cohort two (n = 106), score changes between PRO-CTCAE and SIS for relevant symptoms all had correlations with rs ≥ 0.41. CONCLUSION: An original SIS from the PRO-CTCAE for patients with breast cancer were verified the validity, reliability, and responsiveness. Further studies to improve and validate the SIS are needed.

DOI： 10.1007/s12282-023-01480-3

Metastasis-directed therapy for oligometastases in breast cancer. 査読国際誌

Toshiyuki Ishiba, Ikuno Nishibuchi, Fumikata Hara, Naoto Shikama, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 2023年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

The concept of oligometastases was first proposed to describe a disease state between localized cancer and extensive metastasis. After the emergence of variations in the definition of oligometastasis, in April 2020 the European Society for Radiotherapy and Oncology and the European Organization for Research and Treatment of Cancer defined oligometastases as the presence of one to five metastatic lesions that can be safely treated. However, the pathogenesis of oligometastases remains unknown, and it is uncertain which patients will benefit from metastasis-directed therapy. Breast cancer with oligometastases is generally managed with systemic therapy. Retrospective studies have suggested that the addition of metastasis-directed therapy, such as surgery, radiofrequency ablation and stereotactic body radiation therapy, may increase overall survival in breast cancer patients with oligometastases, but as yet there have been no prospective studies. Phase II trials of stereotactic body radiation therapy or fractionated irradiation for oligometastases of breast cancer have demonstrated impressive rates of local control and overall survival. Although the efficacy of stereotactic body radiation therapy in the SABR-COMET was largely anticipated, it is noteworthy that only 18% of the patient population had breast cancer. For this reason, various trials were planned or are being conducted globally to investigate the efficacy of metastasis-directed therapy for oligometastases of breast cancer. Metastasis-directed therapy for oligometastases has been shown to be effective, and stereotactic body radiation therapy and other therapies are commonly used internationally and are considered to be safe. However, the efficacy of metastasis-directed therapy for oligometastases has not yet been proven. The results of future clinical trials are thus eagerly awaited.

DOI： 10.1093/jjco/hyad077

Impact of Immediate Breast Reconstruction on Survival of Breast Cancer Patients: A Single-Center Observational Study. 査読

Yuko Mukai, Naruto Taira, Yukiko Kajiwara, Takayuki Iwamoto, Yohei Kitaguchi, Miho Saiga, Satoko Watanabe, Tadahiko Shien, Hiroyoshi Doihara, Yoshihiro Kimata

Acta medica Okayama 77 ( 3 ) 281 - 290 2023年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Although immediate breast reconstruction following mastectomy has become increasingly common, its oncological safety has been debated. We enrolled patients with breast cancer who underwent surgery at Okayama University Hospital between 2007 and 2013. The primary outcome was relapse-free survival (RFS). Secondary outcomes were overall survival and the duration from the surgery to the initiation of adjuvant chemotherapy. We divided into immediate breast reconstruction, mastectomy alone, and breast conservative surgery groups. Outcomes were compared using Cox's regression analysis. A total of 614 patients were included (reconstruction: 125, mastectomy: 128, breast conservative surgery: 361). The median follow-up duration was 79.0±31.9 months. The immediate-reconstruction patients were younger, had more lymph node metastases, and more often received postoperative chemotherapy. The RFS was better after the breast conservative surgery compared to after reconstruction (hazard ratio 0.33, 95% confidence interval: 0.144-0.763). The proportion of local recurrence was highest in the reconstruction group. No patients in the reconstruction group underwent postoperative radiation therapy. However, reconstruction did not affect overall survival or the time to the initiation of adjuvant chemotherapy. Surgeons should explain the risks of breast reconstruction to their patients preoperatively. Careful long-term follow-up is required after such procedures.

DOI： 10.18926/AMO/65493

一次乳房再建術後局所再発乳癌の予後日本乳癌学会班研究(枝園班)

関大仁, 荻谷朗子, 名倉直美, 志茂彩華, 成井一隆, 笹田伸介, 石飛真人, 野木裕子, 近藤直人, 櫻井照久, 山内智香子, 森弘樹, 雜賀美穂, 新倉直樹, 枝園忠彦

日本乳癌学会総会プログラム抄録集 31回 77 - 77 2023年6月

トリプルネガティブ乳がんにおける免疫関連細胞の遺伝子発現の検討

高橋侑子, 突沖貴宏, 岩本高行, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 31回 302 - 302 2023年6月

CDK4/6阻害薬の有害事象中止に関する年齢の影響についての検討

仁科卓也, 谷岡真樹, 高田健二, 突沖貴宏, 高橋侑子, 岩本高行, 岩谷胤生, 枝園忠彦

日本乳癌学会総会プログラム抄録集 31回 270 - 270 2023年6月

乳癌患者における術後ホルモン療法による関節痛の増悪頻度とリスク因子を検証する前向きコホート試験

宇野摩耶, 鳩野みなみ, 平成人, 大谷悠介, 鈴木陽子, 中本翔伍, 吉岡遼, 河田健吾, 高橋侑子, 突沖貴宏, 河内麻里子, 池田宏国, 岩本高行, 岩谷胤生, 吉富誠二, 小笠原豊, 原享子, 土井原博義, 枝園忠彦

日本乳癌学会総会プログラム抄録集 31回 328 - 328 2023年6月

がんゲノム徹底討論! 乳癌における包括的ゲノム診療の実際 JBCRG REIWA studyを通して

増田紘子, 多田寛, 服部正也, 古川孝広, 原文堅, 田辺裕子, 相良安昭, 北川大, 枝園忠彦, 岩谷胤生, 八十島宏行, 上本康明, 吉村健一, 岩田広治, 増田慎三

日本乳癌学会総会プログラム抄録集 31回 28 - 28 2023年6月

術前後の化学療法を併用した一次乳房再建は外科的腫瘍学的危険因子ではない日本乳癌学会班研究(枝園班)

野木裕子, 荻谷朗子, 志茂彩華, 名倉直美, 関大仁, 成井一隆, 櫻井照久, 雜賀美穂, 近藤直人, 笹田伸介, 石飛真人, 山内智香子, 森弘樹, 枝園忠彦

日本乳癌学会総会プログラム抄録集 31回 76 - 76 2023年6月

An observational study of the impact of immediate breast reconstruction on perioperative inflammatory cytokines.

Yuko Mukai, Naruto Taira, Yohei Kitaguchi, Ryoko Nakagiri, Miho Saiga, Mariko Kochi, Takayuki Iwamoto, Tadahiko Shien, Hiroyoshi Doihara, Yoshihiro Kimata

Surgery today 2023年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Perioperative inflammatory cytokines may be related to cancer proliferation, although few studies have investigated this issue in patients undergoing breast reconstruction surgery. METHODS: We conducted a prospective study of patients scheduled for mastectomy only, mastectomy plus deep inferior epigastric perforator flap reconstruction (DIEP), or mastectomy plus tissue expander reconstruction (TE), with or without axial dissection (Ax), for primary breast cancer. Blood samples were collected for analysis of serum IL-6 and VEGF preoperatively, then within 24 h postoperatively (POD 1), and 4-6 days postoperatively (POD 4-6). We investigated the difference in serum cytokine levels over time for each surgical procedure and the difference in serum cytokine levels among the procedures at the three measurement time points. RESULTS: There were 120 patients included in the final analysis. Serum IL-6 was significantly higher than the preoperative level on POD 1 in patients who underwent mastectomy only, DIEP, or TE and Ax (+), with higher values persisting on POD 4-6 except in those who underwent DIEP. IL-6 was significantly higher after DIEP than after mastectomy only on POD 1, but no differences were observed at POD 4-6. VEGF did not differ significantly among the surgical procedures at any time. CONCLUSIONS: The increase in IL-6 was short term and immediate breast reconstruction is considered a safe procedure.

DOI： 10.1007/s00595-023-02700-1

内分泌外科手術での合併症を防ぐための試みわが国の甲状腺・副甲状腺手術による手術部位感染の現状と課題厚生労働省院内感染対策サーベイランス事業データベース解析

岩谷胤生, 吉本皓一, 突沖貴宏, 高橋侑子, 枝園忠彦

日本内分泌外科学会雑誌 40 ( Suppl.1 ) S121 - S121 2023年5月

進行・再発乳癌における外科治療の意義と適応転移乳癌に対する局所療法のサブタイプ毎の意義と適応

枝園忠彦, 仁科卓也, 吉本晧一, 宇野摩耶, 中本翔伍, 大谷悠介, 突沖貴宏, 高橋侑子, 岩本高行, 岩谷胤生

日本外科学会定期学術集会抄録集 123回 SY - 1 2023年4月

進行・再発乳癌における外科治療の意義と適応転移乳癌に対する局所療法のサブタイプ毎の意義と適応

枝園忠彦, 仁科卓也, 吉本晧一, 宇野摩耶, 中本翔伍, 大谷悠介, 突沖貴宏, 高橋侑子, 岩本高行, 岩谷胤生

日本外科学会定期学術集会抄録集 123回 SY - 1 2023年4月

Safety and Efficacy of a Well-Fitting Brassiere after Breast Reconstruction: A Qualitative Study.

Satoko Watanabe, Miho Saiga, Takayuki Motoki, Tadahiko Shien, Naruto Taira, Hiroyoshi Doihara, Yoshihiro Kimata

Acta medica Okayama 77 ( 1 ) 11 - 19 2023年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

The importance of a well-fitted, comfortable brassiere to overall quality of life after breast reconstruction has not been evaluated. Our aim was to determine the impact of a semi-customized brassiere on patients' health-related quality of life after breast reconstruction. The subjects were prospective patients with mastectomy who were to undergo immediate or delayed breast reconstruction at our hospital. After surgery, a professional bra fitter sized each patient for a semi-customized brassiere and provided follow-up consultations. A self-reported questionnaire on breast aesthetics, postoperative pain, and satisfaction was used to assess the primary outcomes. Data were prospectively collected at baseline (before surgery) and at 1, 3, 6, and 12 months after surgery and analyzed. Forty-six patients (50 breasts) were included in the analysis. Consistent wearing of the brassiere reduced pain (p<0.05), with good overall satisfaction (p<0.001). Aesthetic scores on breast shape and size were higher with than without the custom brassiere at 3 months (p=0.02) and 6 months (p=0.03) after surgery. Wearing the brassiere reduced anxiety at all time points of measurement. A well-fitting brassiere ensured safety and provided a high degree of satisfaction without anxiety for patients after breast reconstruction.

DOI： 10.18926/AMO/64356

Preferences Regarding Breast Surgery Omission Among Patients With Breast Cancer Who Receive Neoadjuvant Chemotherapy. 国際誌

Kaho Nakamura, Makoto Ishitobi, Chiya Oshiro, Hiroaki Shima, Eriko Takahashi, Takahiro Nakayama, Tadahiko Shien, Kanako Saito, Tsuguo Iwatani, Yukiko Seto, Kaori Terata, Goro Kutomi, Tomoko Ogawa, Hideo Inaji

In vivo (Athens, Greece) 37 ( 2 ) 794 - 800 2023年

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND/AIM: Currently, several ongoing prospective studies are investigating the safety of breast surgery omission in patients with breast cancer who are exceptional responders to neoadjuvant chemotherapy. However, there is little information about the preferences of these patients regarding omission of breast surgery. PATIENTS AND METHODS: We conducted a questionnaire survey to assess preferences regarding omission of breast surgery among patients with breast cancer who had human epidermal growth factor receptor 2-positive or estrogen receptor-negative tumors and good clinical response after neoadjuvant chemotherapy. Patients' estimation of the risk of ipsilateral breast tumor recurrence (IBTR) after definitive surgery or breast surgery omission was also assessed. RESULTS: Of 93 patients, only 22 (23.7%) said they would omit breast surgery. Under the scenario of omitting breast surgery, the 5-year IBTR rate estimated by patients who said they would omit breast surgery was significantly lower (median, 10%) than the rate estimated by patients who preferred undergoing definitive surgery (median, 30%) (p=0.017). CONCLUSION: The proportion of our surveyed patients who were willing to omit breast surgery was low. Patients who said they preferred to omit breast surgery overestimated the 5-year IBTR risk.

DOI： 10.21873/invivo.13143

Physicians' perception about the impact of breast reconstruction on patient prognosis: a survey in Japan.

Rena Yamakado, Makoto Ishitobi, Naoto Kondo, Chikako Yamauchi, Shinsuke Sasada, Hiroko Nogi, Miho Saiga, Akiko Ogiya, Kazutaka Narui, Hirohito Seki, Naomi Nagura, Ayaka Shimo, Teruhisa Sakurai, Naoki Niikura, Hiroki Mori, Tadahiko Shien

Breast cancer (Tokyo, Japan) 30 ( 2 ) 1 - 7 2022年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: One barrier to the widespread use of breast reconstruction (BR) is physicians' perception that BR adversely affects breast cancer prognosis. However, there is limited information regarding physicians' understanding of the impact of BR on patient prognosis and which physicians have misunderstandings about BR. METHODS: We conducted an e-mail survey regarding the impact of BR on the prognosis of patients with breast cancer among members of the Japanese Breast Cancer Society. RESULTS: Of 369 respondents, 99 (27%) said that they believe BR affects patient prognosis. Female respondents and those who treat fewer new breast cancer patients per year were more likely to state that they believe BR affects patient prognosis (P = 0.006 and 0.007). Respondents who believed that BR affects patient prognosis underestimated 5-year overall survival rates in patients who receive BR and subsequently have local or regional recurrence in different sites. CONCLUSION: Our survey demonstrated that a quarter of respondents believe that BR affects patient prognosis and underestimate survival rates in patients who receive BR and have subsequent local or regional recurrence. Because of the lack of evidence regarding the impact of BR on patient prognosis, educating physicians by providing accurate knowledge regarding BR and patient prognosis is highly recommended.

DOI： 10.1007/s12282-022-01421-6

Association of Genetic Polymorphism with Taxane-induced Peripheral Neuropathy: Sub-analysis of a Randomized Phase II Study to Determine the Optimal Dose of 3-week Cycle Nab-Paclitaxel in Metastatic Breast Cancer Patients.

Yuko Abe, Naruto Taira, Kosuke Kashiwabara, Junji Tsurutani, Masahiro Kitada, Masato Takahashi, Hiroaki Kato, Yuichiro Kikawa, Eiko Sakata, Yoichi Naito, Yoshie Hasegawa, Tsuyoshi Saito, Tsutomu Iwasa, Tsutomu Takashima, Tomohiko Aihara, Hirofumi Mukai, Fumikata Hara, Tadahiko Shien, Hiroyoshi Doihara, Shinichi Toyooka

Acta medica Okayama 76 ( 6 ) 661 - 671 2022年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

Chemotherapy-induced peripheral neuropathy (CIPN) is an important clinical challenge that threatens patients' quality of life. This sub-study of the ABROAD trial investigated the influence of single nucleotide polymorphisms (SNPs) on CIPN, using genotype data from a randomized study to determine the optimal dose of a 3-week-cycle regimen of nab-paclitaxel (q3w nab-PTX) in patients with metastatic breast cancer (MBC). Patients with HER2-negative MBC were randomly assigned to three doses of q3w nab-PTX (SD: 260 mg/m2 vs. MD: 220 mg/m2 vs. LD: 180 mg/m2). Five SNPs (EPHA4-rs17348202, EPHA5-rs7349683, EPHA6-rs301927, LIMK2-rs5749248, and XKR4-rs4737264) were analyzed based on the results of a previous genome-wide association study. Per-allele SNP associations were assessed by a Cox regression to model the cumulative dose of nab-PTX up to the onset of severe or worsening sensory neuropathy. A total of 141 patients were enrolled in the parent study; 91(65%) were included in this sub-study. Worsening of CIPN was significantly greater in the cases with XKR4 AC compared to those with a homozygote AA (HR 1.86, 95%CI: 1.00001-3.46, p=0.049). There was no significant correlation of CIPN with any other SNP. A multivariate analysis showed that the cumulative dose of nab-PTX was most strongly correlated with CIPN (p<0.01).

DOI： 10.18926/AMO/64116

ASO Author Reflections: Is Nipple-Areolar Recurrence After Nipple-Sparing Mastectomy Simply a "Cosmetic Failure"? 査読国際誌

Makoto Ishitobi, Tadahiko Shien

Annals of surgical oncology 2022年11月

Classification of Local Recurrence After Nipple-Sparing Mastectomy Based on Location: The Features of Nipple-Areolar Recurrence Differ from Those of Other Local Recurrences. 査読国際誌

Ayu Yamaguchi, Makoto Ishitobi, Naomi Nagura, Ayaka Shimo, Hirohito Seki, Akiko Ogiya, Teruhisa Sakurai, Yukiko Seto, Chiya Oshiro, Shinsuke Sasada, Michiko Kato, Takahiko Kawate, Naoto Kondo, Kazutaka Narui, Tsuyoshi Nakagawa, Hiroko Nogi, Chikako Yamauchi, Koichiro Tsugawa, Yuka Kajiura, Tadahiko Shien

Annals of surgical oncology 30 ( 3 ) 1678 - 1686 2022年11月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Little information is available about the clinical and pathologic characteristics of local recurrence (LR) after nipple-sparing mastectomy according to the locations of LR. METHODS: This study classified 99 patients into the following two groups according to the location of LR after nipple-sparing mastectomy: nipple-areolar recurrence (NAR) group and other locations of LR (oLR) group. The study evaluated whether the location of LR was associated with disease-free survival (DFS) after LR resection. RESULTS: For about half of the patients (44.4 %) with NAR, the primary cancer was estrogen receptor (ER)-negative and human epidermal growth factor receptor 2 (HER2)-positive. Conversely, in most of the patients with oLR (79.2 %), the primary cancer was ER-positive and HER2-negative. Among the LR tumors, the frequency of noninvasive carcinoma in the NAR tumors was significantly higher than in the oLR tumors (51.9 % vs 4.2 %, respectively). During a median follow-up period of 46 months, the location of LR was not associated with DFS after LR. In the NAR group, the presence or absence of LR tumor invasiveness was the only factor associated with DFS. In the oLR group, age at primary surgery was the only factor associated with DFS. CONCLUSION: This multi-institutional retrospective study demonstrated that the features of NAR, such as the characteristics of the primary and recurrent tumors and the prognostic factors after LR resection, were quite different from those of oLR.

DOI： 10.1245/s10434-022-12760-1

乳がん手術におけるパラダイムシフト-EscalationとDe-escalation- 転移乳がんに対する局所療法はescalationかde-escalationか?

枝園忠彦, 戸嶋圭, 鈴木陽子, 宇野摩耶, 吉岡遼, 中本翔吾, 突沖貴宏, 高橋侑子, 岩本高行, 谷岡真樹, 岩谷胤生

日本癌治療学会学術集会抄録集 60回 OWS22 - 2 2022年10月

乳がん手術におけるパラダイムシフト-EscalationとDe-escalation- 転移乳がんに対する局所療法はescalationかde-escalationか?

枝園忠彦, 戸嶋圭, 鈴木陽子, 宇野摩耶, 吉岡遼, 中本翔吾, 突沖貴宏, 高橋侑子, 岩本高行, 谷岡真樹, 岩谷胤生

日本癌治療学会学術集会抄録集 60回 OWS22 - 2 2022年10月

転移・再発乳癌における遺伝子パネル検査の観察研究REIWA studyの中間解析

増田紘子, 多田寛, 安立弥生, 岩谷胤生, 上本康明, 北川大, 古川孝広, 相良安昭, 枝園忠彦, 原文堅, 八十島宏行, 吉村健一, 岩田広治, 増田慎三

日本癌治療学会学術集会抄録集 60回 O11 - 5 2022年10月

男女を問わず外科医が輝き続けるためにステレオタイプ・スレットという問題とニュースレターの果たす役割

竹原裕子, 溝尾妙子, 小林純子, 坂本美咲, 新田薫, 工藤由里絵, 安井和也, 菊池覚次, 黒田新士, 吉田龍一, 岡崎幹生, 枝園忠彦, 山根正修, 小谷恭弘, 豊岡伸一, 笠原真悟, 土井原博義, 藤原俊義

日本外科学会雑誌 123 ( 5 ) 501 - 502 2022年9月

【乳癌に対する乳頭温存乳房全切除術施行後の局所再発パターン別予後レビュー】

山口亜友, 石飛真人, 河手敬彦, 枝園忠彦, 関大仁

Oncoplastic Breast Surgery 7 ( 3 ) 69 - 71 2022年9月

記述言語：日本語出版者・発行元：(一社)日本乳房オンコプラスティックサージャリー学会

われわれは,乳頭温存乳房全切除術施行後の乳癌患者における局所再発パターン別予後に関する論文のレビューを行ったので報告する。(著者抄録)

その他リンク： https://search.jamas.or.jp/default/link?pub_year=2022&ichushi_jid=J06905&link_issn=&doc_id=20221006150002&doc_link_id=10.20699%2Fjopbs.7.3_69&url=https%3A%2F%2Fdoi.org%2F10.20699%2Fjopbs.7.3_69&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

Predictive value of immune genomic signatures from breast cancer cohorts containing data for both response to neoadjuvant chemotherapy and prognosis after surgery.

Yidan Zhu, Takayuki Iwamoto, Yukiko Kajiwara, Yuko Takahashi, Mariko Kochi, Tadahiko Shien, Naruto Taira, Shinichi Toyooka, Hiroyoshi Doihara

Breast cancer (Tokyo, Japan) 30 ( 1 ) 56 - 67 2022年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Previous studies of immune genomic signatures (IGSs) in breast cancer have attempted to predict the response to chemotherapy or prognosis and were performed using different patient cohorts. The purpose of this study was to evaluate the predictive functions of various IGSs using the same patient cohort that included data for response to chemotherapy as well as the prognosis after surgery. METHODS: We applied five previously described IGS models in a public dataset of 508 breast cancer patients treated with neoadjuvant chemotherapy. The prognostic and predictive values of each model were evaluated, and their correlations were compared. RESULTS: We observed a high proportion of expression concordance among the IGS models (r: 0.56-1). Higher scores of IGSs were detected in aggressive breast cancer subtypes (basal and HER2-enriched) (P < 0.001). Four of the five IGSs could predict chemotherapy responses and two could predict 5-year relapse-free survival in cases with hormone receptor-positive (HR +) tumors. However, the models showed no significant differences in their predictive abilities for hormone receptor-negative (HR-) tumors. CONCLUSIONS: IGSs are, to some extent, useful for predicting prognosis and chemotherapy response; moreover, they show substantial agreement for specific breast cancer subtypes. However, it is necessary to identify more compelling biomarkers for both prognosis and response to chemotherapy in HR- and HER2 + cases.

DOI： 10.1007/s12282-022-01397-3

Gene Expression Profiling between Patient Groups with High and Low Ki67 Levels after Short-term Preoperative Aromatase Inhibitor Treatment for Breast Cancer.

Yukiko Kajiwara, Takayuki Iwamoto, Yidan Zhu, Mariko Kochi, Tadahiko Shien, Naruto Taira, Hiroyoshi Doihara, Shinichi Toyooka

Acta medica Okayama 76 ( 4 ) 399 - 408 2022年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

According to a recent report, a low Ki67 level after short-term preoperative hormone therapy (post-Ki67) might suggest a more favorable prognosis compared with a high post-Ki67 level in patients with hormone receptorpositive/human epidermal growth factor 2-negative (HR+/HER2-) breast cancer with high levels of Ki67. This study aimed to evaluate the pre-treatment genetic differences between these two patient groups. Forty-five luminal B-like patients were stratified into two groups, namely, a group with high (H→H) and one with low (H→L) Ki67 levels after short-term preoperative aromatase inhibitor (AI) treatment. We compared pre-treatment gene expression profiles between the two groups. In gene level analysis, there was no significant difference between the two groups by the class comparison test. In pathway analysis, five metabolism-related gene sets were significantly upregulated in the H→L group (p≤0.05). In the search for novel targets, five genes (PARP, BRCA2, FLT4, CDK6, and PDCD1LG2) showed significantly higher expression in the H→H group (p≤0.05). Several metabolism-related pathways were associated with sensitivity to AI. In the future, it will be necessary to seek out new therapeutic strategies for the poor prognostic group with high post-Ki67.

DOI： 10.18926/AMO/63894

Drug repositioning of tranilast to sensitize a cancer therapy by targeting cancer-associated fibroblast. 国際誌

Kosuke Ochi, Ken Suzawa, Yin Min Thu, Fumiaki Takatsu, Shimpei Tsudaka, Yidan Zhu, Kentaro Nakata, Tatsuaki Takeda, Kazuhiko Shien, Hiromasa Yamamoto, Mikio Okazaki, Seiichiro Sugimoto, Tadahiko Shien, Yoshiharu Okamoto, Shuta Tomida, Shinichi Toyooka

Cancer science 113 ( 10 ) 3428 - 3436 2022年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

Cancer-associated fibroblasts (CAFs) are a major component of the tumor microenvironment that mediate resistance of cancer cells to anticancer drugs. Tranilast is an antiallergic drug that suppresses the release of cytokines from various inflammatory cells. In this study, we investigated the inhibitory effect of tranilast on the interactions between non-small cell lung cancer (NSCLC) cells and the CAFs in the tumor microenvironment. Three EGFR-mutant NSCLC cell lines, two KRAS-mutant cell lines and three CAFs derived from NSCLC patients were used. To mimic the tumor microenvironment, the NSCLC cells were co-cultured with the CAFs in vitro, and the molecular profiles and sensitivity to molecular targeted therapy were assessed. Crosstalk between NSCLC cells and CAFs induced multiple biological effects on the NSCLC cells both in vivo and in vitro, including activation of the STAT3 signaling pathway, promotion of xenograft tumor growth, induction of epithelial-mesenchymal transition (EMT), and acquisition of resistance to molecular-targeted therapy, including of EGFR-mutant NSCLC cells to osimertinib and of KRAS-mutant NSCLC cells to selumetinib. Treatment with tranilast led to inhibition of IL-6 secretion from the CAFs, which, in turn, resulted in inhibition of CAF-induced phospho-STAT3 upregulation. Tranilast also inhibited CAF-induced EMT in the NSCLC cells. Finally, combined administration of tranilast with molecular-targeted therapy reversed the CAF-mediated resistance of the NSCLC cells to the molecular-targeted drugs, both in vitro and in vivo. Our results showed that combined administration of tranilast with molecular-targeted therapy is a possible new treatment strategy to overcome drug resistance caused by cancer- CAF interaction.

DOI： 10.1111/cas.15502

乳癌内分泌療法の課題と展望転移乳癌に対する治療戦略としての局所療法と内分泌療法の課題と展望

枝園忠彦, 戸嶋圭, 中本翔伍, 宇野摩耶, 吉岡遼, 鈴木陽子, 高橋侑子, 岩本高行, 岩谷胤生

日本内分泌外科学会雑誌 39 ( Suppl.1 ) S126 - S126 2022年6月

転移・再発乳癌における遺伝子パネル検査F1CDxとF1LCDxの治療方針決定に与える影響を検討する観察研究

多田寛, 増田紘子, 安立弥生, 岩谷胤生, 上本康明, 大谷陽子, 梶原友紀子, 北川大, 古川孝広, 相良安昭, 枝園忠彦, 田辺裕子, 谷岡真樹, 服部正也, 原文堅, 八十島宏行, 吉村健一, 岩田広治, 増田慎三

日本乳癌学会総会プログラム抄録集 30回 PD7 - 2 2022年6月

乳房再建術が周術期の炎症性サイトカインに及ぼす影響についての検討

向井裕子, 平成人, 北口陽平, 中桐僚子, 雑賀美帆, 河内麻里子, 岩本高行, 枝園忠彦, 土井原博義, 木股敬裕

日本乳癌学会総会プログラム抄録集 30回 EP13 - 9 2022年6月

当科におけるBRCA1/2病的バリアント保持者へのリスク低減乳房切除術の現状

間森智加, 河内麻里子, 大谷悠介, 吉岡遼, 藤原みわ, 中本翔伍, 鈴木陽子, 宇野摩耶, 鳩野みなみ, 安部優子, 高橋侑子, 岩本高行, 枝園忠彦, 平成人, 土井原博義

日本乳癌学会総会プログラム抄録集 30回 PO15 - 5 2022年6月

乳癌内分泌療法の課題と展望転移乳癌に対する治療戦略としての局所療法と内分泌療法の課題と展望

枝園忠彦, 戸嶋圭, 中本翔伍, 宇野摩耶, 吉岡遼, 鈴木陽子, 高橋侑子, 岩本高行, 岩谷胤生

日本内分泌外科学会雑誌 39 ( Suppl.1 ) S126 - S126 2022年6月

AYA世代患者の乳房再建と妊娠・出産

中桐僚子, 雑賀美帆, 向井裕子, 北口陽平, 渡部聡子, 高橋侑子, 河内麻里子, 岩本高行, 枝園忠彦, 平成人, 露無祐子, 土井原博義, 木股敬裕

日本乳癌学会総会プログラム抄録集 30回 PO17 - 1 2022年6月

対側リスク低減乳房切除術で非浸潤性乳管癌が発見された遺伝性乳癌卵巣癌症候群の1例

中川里沙子, 宇野摩耶, 間森智加, 河内麻里子, 大谷悠介, 吉岡遼, 藤原みわ, 中本翔伍, 鈴木陽子, 安部優子, 鳩野みなみ, 高橋侑子, 都地友紘, 岩本高行, 枝園忠彦, 平成人, 柳井広之, 土井原博義

日本乳癌学会総会プログラム抄録集 30回 EP11 - 68 2022年6月

当院における甲状腺がん遺伝子パネル検査の実施経験

高橋侑子, 枝園忠彦, 土井原博義

日本内分泌外科学会雑誌 39 ( Suppl.1 ) S180 - S180 2022年6月

臨床研究におけるエンドポイントとしてのHRQOLの意義 Emoji Sticker scaleを用いた患者報告アウトカムの妥当性と信頼性を検証する調査研究

鈴木陽子, 平成人, 間森智加, 大谷悠介, 吉岡遼, 藤原みわ, 中本翔佑, 宇野摩耶, 安部優子, 鳩野みなみ, 高橋侑子, 岩本高行, 枝園忠彦, 木川雄一郎, 上村夕香理, 萩原康博, 山本精一郎, 土井原博義

日本乳癌学会総会プログラム抄録集 30回 SY11 - 4 2022年6月

地域における乳がん患者に対する妊孕性温存の現状と課題

枝園忠彦, 露無裕子, 樫野千明, 中塚幹也, 鳩野みなみ, 間森智花, 宇野摩耶, 中本翔伍, 吉岡遼, 藤原みわ, 鈴木陽子, 高橋侑子, 河内麻里子, 岩本高行, 平成人, 土井原博義

日本乳癌学会総会プログラム抄録集 30回 OS9 - 3 2022年6月

(第26回)乳癌学会班研究「乳房再建の安全性と予後に関する研究」報告

枝園忠彦, 野木裕子, 山内智香子, 森弘樹, 石飛真人, 笹田伸介, 荻谷朗子, 近藤直人, 志茂彩華, 寺田かおり, 雑賀美帆, 関大仁, 名倉直美, 櫻井照久, 成井一隆, 新倉直樹

日本乳癌学会総会プログラム抄録集 30回 np66 - np66 2022年6月

腋窩リンパ節転移陽性乳癌に対する一次乳房再建の適応と安全性乳がん治療再建センターにおける腋窩リンパ節転移陽性乳癌に対する一次乳房再建

枝園忠彦, 岡美苗, 戸嶋圭, 中本翔伍, 宇野摩耶, 吉岡遼, 鈴木陽子, 大谷悠介, 高橋侑子, 岩本高行, 岩谷胤生

日本外科系連合学会誌 47 ( 3 ) 374 - 374 2022年5月

腋窩リンパ節転移陽性乳癌に対する一次乳房再建の適応と安全性乳がん治療再建センターにおける腋窩リンパ節転移陽性乳癌に対する一次乳房再建

枝園忠彦, 岡美苗, 戸嶋圭, 中本翔伍, 宇野摩耶, 吉岡遼, 鈴木陽子, 大谷悠介, 高橋侑子, 岩本高行, 岩谷胤生

日本外科系連合学会誌 47 ( 3 ) 374 - 374 2022年5月

Management of breast cancer in older patients. 国際誌

Masataka Sawaki, Akihiko Shimomura, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 52 ( 7 ) 674 - 681 2022年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Japanese women have the highest life expectancy in the world and breast cancer is the most prevalent cancer among them. However, little data are available to support the evidence-based clinical management due to the fact that older adults are commonly excluded from most clinical trials. In Japan the rate of other cause of death in older patient was about a half, then we should consider whether or not breast cancer may affect the patient's life expectancy to avoid either overtreatment or undertreatment. Although management principles in older patients may be similar with those of younger age, these differences would be caused by relatively short life expectancy, some comorbidity, drug interactions and low functional status. Then, their treatment needs to be individualized. To this end, employing a comprehensive geriatric assessment may be advantageous, which enables to evaluate patient vulnerability from several different aspects, to predict adverse events of chemotherapy and to identify geriatric problems in advance so that extra support and modified treatment can be provided. Before treatment we should assess the patient's goals and values regarding the management of the cancer, especially on balancing survival benefit with immediate quality of life impairment due to anti-cancer therapy. In Japan Clinical Oncology Group (JCOG) , a randomized controlled trial for older patients with advanced stage HER2-positive breast cancer is ongoing as an inferiority design including geriatric assessment (JCOG1607, HARB TEA study). Best practice, current management and how to approach decision making in older patients with breast cancer are summarized.

DOI： 10.1093/jjco/hyac054

ステレオタイプ・スレットという問題とニュースレターの果たす役割

竹原裕子, 溝尾妙子, 小林純子, 坂本美咲, 新田薫, 工藤由里絵, 安井和也, 菊池覚次, 黒田新士, 吉田龍一, 岡崎幹生, 杉本誠一郎, 枝園忠彦, 小谷恭弘, 豊岡伸一, 笠原真悟, 藤原俊義, 土井原博義

日本外科学会定期学術集会抄録集 122回 SP - 6 2022年4月

未来を拓く乳腺外科領域の臨床試験乳癌診療ガイドラインから見た乳がん外科領域の臨床試験

九冨五郎, 坂井威彦, 枝園忠彦, 麻賀創太, 有賀智之, 石飛真人, 久芳さやか, 澤木正孝, 寺田かおり, 冨田興一, 井口雅史, 岩田広治, 佐治重衡

日本外科学会定期学術集会抄録集 122回 WS - 1 2022年4月

未来を拓く乳腺外科領域の臨床試験乳癌診療ガイドラインから見た乳がん外科領域の臨床試験

九冨五郎, 坂井威彦, 枝園忠彦, 麻賀創太, 有賀智之, 石飛真人, 久芳さやか, 澤木正孝, 寺田かおり, 冨田興一, 井口雅史, 岩田広治, 佐治重衡

日本外科学会定期学術集会抄録集 122回 WS - 1 2022年4月

ステレオタイプ・スレットという問題とニュースレターの果たす役割

竹原裕子, 溝尾妙子, 小林純子, 坂本美咲, 新田薫, 工藤由里絵, 安井和也, 菊池覚次, 黒田新士, 吉田龍一, 岡崎幹生, 杉本誠一郎, 枝園忠彦, 小谷恭弘, 豊岡伸一, 笠原真悟, 藤原俊義, 土井原博義

日本外科学会定期学術集会抄録集 122回 SP - 6 2022年4月

異所性甲状腺腫を疑った頸部正中の低分化がんの一例

中野佳奈子, 奥田静香, 羽原俊宏, 林伸旨, 枝園忠彦, 高橋侑子

乳腺甲状腺超音波医学 11 ( 2 ) 176 - 176 2022年4月

Health-related quality of life and estimation of the minimally important difference in the Functional Assessment of Cancer Therapy-Endocrine Symptom score in postmenopausal ER+/HER2- metastatic breast cancer with low sensitivity to endocrine therapy. 国際誌

Yuichiro Kikawa, Yasuhiro Hagiwara, Tomomi Fujisawa, Kazuhiro Araki, Takayuki Iwamoto, Takafumi Sangai, Tadahiko Shien, Shintaro Takao, Reiki Nishimura, Masato Takahashi, Tatsuya Toyama, Tomohiko Aihara, Hirofumi Mukai, Naruto Taira

PloS one 17 ( 11 ) e0278344 2022年

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The HORSE-BC study previously demonstrated that second-line endocrine therapy (ET) for patients with acquired endocrine-resistant metastatic breast cancer (MBC) still provided a clinically meaningful benefit. Herein, we investigated the health-related quality of life (HRQOL) in the HORSE-BC study. METHODS: Patients with acquired endocrine-resistant MBC who were scheduled for second-line ET were recruited. The HRQOL was assessed at baseline, and 1 and 3 months after second-line ET initiation. To investigate the minimally important difference (MID) in the Functional Assessment of Cancer Therapy-Endocrine Symptoms (FACT-ES), we evaluated the means and standard deviations for the distribution-based method, and differences in the change in HRQOL for the anchor-based method. We also investigated the association between FACT-ES total scores and clinical benefit. RESULTS: Overall, 56 patients were enrolled. Of these, 47 were analyzed. When defined as 1/3 standard deviation estimates based on the distribution method, the calculated MID was 5.9. The MIDs of the FACT-ES total scores based on the anchor method were 7.7 for decline and 4.1 for improvement. The MID decline proportions were 6.1% and 14.7% lower in patients who experienced clinical benefits than in those who did not at 1 and 3 months, respectively. The ratios of MID improvement in patients who experienced clinical benefits were 18.3% and 3.2% higher, respectively; the mean change in the FACT-ES total score from baseline improved in patients who experienced clinical benefits. CONCLUSIONS: Maintaining the HRQOL as determined by FACT-ES may be associated with clinical benefits in patients with acquired endocrine-resistant MBC treated with ET.

DOI： 10.1371/journal.pone.0278344

MEN1疑いの家族歴と上縦隔に進展する副甲状腺癌を認めた1例

大塚勇輝, 長谷川功, 原田洸, 西村義人, 岡浩介, 小野早和子, 枝園忠彦, 平沢晃, 大塚文男

日本内分泌学会雑誌 97 ( 4 ) 946 - 946 2021年12月

MEN1疑いの家族歴と上縦隔に進展する副甲状腺癌を認めた1例

大塚勇輝, 長谷川功, 原田洸, 西村義人, 岡浩介, 小野早和子, 枝園忠彦, 平沢晃, 大塚文男

日本内分泌学会雑誌 97 ( 4 ) 946 - 946 2021年12月

YES1 as a Therapeutic Target for HER2-Positive Breast Cancer after Trastuzumab and Trastuzumab-Emtansine (T-DM1) Resistance Development. 国際誌

Miwa Fujihara, Tadahiko Shien, Kazuhiko Shien, Ken Suzawa, Tatsuaki Takeda, Yidan Zhu, Tomoka Mamori, Yusuke Otani, Ryo Yoshioka, Maya Uno, Yoko Suzuki, Yuko Abe, Minami Hatono, Takahiro Tsukioki, Yuko Takahashi, Mariko Kochi, Takayuki Iwamoto, Naruto Taira, Hiroyoshi Doihara, Shinichi Toyooka

International journal of molecular sciences 22 ( 23 ) 2021年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

Trastuzumab-emtansine (T-DM1) is a therapeutic agent molecularly targeting human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer (MBC), and it is especially effective for MBC with resistance to trastuzumab. Although several reports have described T-DM1 resistance, few have examined the mechanism underlying T-DM1 resistance after the development of acquired resistance to trastuzumab. We previously reported that YES1, a member of the Src family, plays an important role in acquired resistance to trastuzumab in HER2-amplified breast cancer cells. We newly established a trastuzumab/T-DM1-dual-resistant cell line and analyzed the resistance mechanisms in this cell line. At first, the T-DM1 effectively inhibited the YES1-amplified trastuzumab-resistant cell line, but resistance to T-DM1 gradually developed. YES1 amplification was further enhanced after acquired resistance to T-DM1 became apparent, and the knockdown of the YES1 or the administration of the Src inhibitor dasatinib restored sensitivity to T-DM1. Our results indicate that YES1 is also strongly associated with T-DM1 resistance after the development of acquired resistance to trastuzumab, and the continuous inhibition of YES1 is important for overcoming resistance to T-DM1.

DOI： 10.3390/ijms222312809

岡山大学外科広域外科専門研修プログラム関連病院における専攻医の産前産後休暇・育児休業/休暇・介護休業/休暇、その他支援についての実態調査

竹原裕子, 溝尾妙子, 小林純子, 菊地覚次, 池田宏国, 岡崎幹生, 吉田龍一, 黒田新士, 枝園忠彦, 小谷恭弘, 山根正修, 豊岡伸一, 笠原真悟, 土井原博義, 藤原俊義

日本臨床外科学会雑誌 82 ( 増刊 ) S24 - S24 2021年10月

岡山大学外科広域外科専門研修プログラム関連病院における専攻医の産前産後休暇・育児休業/休暇・介護休業/休暇、その他支援についての実態調査

竹原裕子, 溝尾妙子, 小林純子, 菊地覚次, 池田宏国, 岡崎幹生, 吉田龍一, 黒田新士, 枝園忠彦, 小谷恭弘, 山根正修, 豊岡伸一, 笠原真悟, 土井原博義, 藤原俊義

日本臨床外科学会雑誌 82 ( 増刊 ) S24 - S24 2021年10月

長期にわたって乳房腫瘤を自覚していた若年乳癌の一例

中川里沙子, 宇野摩耶, 岩本高行, 三又明日香, 間森智加, 安部優子, 鳩野みなみ, 西村碧フィリーズ, 高橋侑子, 河内麻里子, 都地友紘, 枝園忠彦, 平成人, 柳井広之, 土井原博義

日本臨床外科学会雑誌 82 ( 増刊 ) S1220 - S1220 2021年10月

乳がん治療における手術省略の可能性乳がん非切除療法の検証特定臨床研究JCOG1806の挑戦

藤澤知巳, 重松英朗, 枝園忠彦, 石塚俊之, 田中希世, 木川雄一郎, 鹿間直人, 吉村通央, 岩田広治, 佐々木啓太

日本臨床外科学会雑誌 82 ( 増刊 ) S123 - S123 2021年10月

乳癌治療におけるデエスカレーションとエスカレーション-さらなる個別化- HER2陽性乳癌に対する根治的化学療法+放射線療法の可能性

重松英朗, 藤澤知巳, 枝園忠彦, 田中希世, 石場俊之, 椋本宜学, 吉村通央, 鹿間直人, 岩田広治

日本癌治療学会学術集会抄録集 59回 SY3 - 2 2021年10月

A randomized phase III study comparing trastuzumab emtansine with trastuzumab, pertuzumab and docetaxel in elderly patients with advanced stage HER2-positive breast cancer: Japan Clinical Oncology Group Study (JCOG1607, HERB TEA study). 国際誌

Akihiko Shimomura, Kenji Tamura, Kiyo Tanaka, Tomonori Mizutani, Keita Sasaki, Yuta Sekino, Masataka Sawaki, Tadahiko Shien, Taro Shibata, Hiroji Iwata

Japanese journal of clinical oncology 51 ( 9 ) 1471 - 1474 2021年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

The standard first-line treatment for patients with human epidermal growth factor 2-positive metastatic breast cancer is a combination therapy of trastuzumab, pertuzumab and docetaxel, and the standard second-line treatment is trastuzumab emtansine. However, it may be difficult for the elderly to maintain sufficient intensity of treatment due to severe adverse events of trastuzumab, pertuzumab and docetaxel. The aim of this trial is to confirm the non-inferiority of trastuzumab emtansine over trastuzumab, pertuzumab and docetaxel in terms of overall survival in elderly (65-year-old or more) patients with human epidermal growth factor 2-positive metastatic breast cancer. If improved overall survival and fewer toxicities are observed, trastuzumab emtansine may be a feasible new standard first-line treatment for elderly patients with human epidermal growth factor 2-positive metastatic breast cancer. A planned total 330 patients will be enrolled from 45 institutions over 6.5 years. This trial has been registered in the UMIN Clinical Trials Registry as UMIN000030783 [http://www.umin.ac.jp/ctr/index.htm].

DOI： 10.1093/jjco/hyab101

Corrigendum to: A randomized phase III study comparing trastuzumab emtansine with trastuzumab, pertuzumab and docetaxel in elderly patients with advanced stage HER2-positive breast cancer: Japan Clinical Oncology Group Study (JCOG1607, HERB TEA study). 国際誌

Akihiko Shimomura, Kenji Tamura, Kiyo Tanaka, Tomonori Mizutani, Keita Sasaki, Yuta Sekino, Masataka Sawaki, Tadahiko Shien, Taro Shibata, Hiroji Iwata

Japanese journal of clinical oncology 51 ( 9 ) 1479 - 1479 2021年8月

Clinicopathological predictors of postoperative upstaging to invasive ductal carcinoma (IDC) in patients preoperatively diagnosed with ductal carcinoma in situ (DCIS): a multi-institutional retrospective cohort study.

Kiyo Tanaka, Norikazu Masuda, Naoki Hayashi, Yasuaki Sagara, Fumikata Hara, Takayuki Kadoya, Akira Matsui, Chieko Miyazaki, Tadahiko Shien, Eriko Tokunaga, Takako Hayashi, Naoki Niikura, Shigeto Maeda, Yoshihumi Komoike, Hiroko Bando, Chizuko Kanbayashi, Hiroji Iwata

Breast cancer (Tokyo, Japan) 28 ( 4 ) 896 - 903 2021年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: We conducted a prospective study with the intention to omit surgery for patients with ductal carcinoma in situ (DCIS) of the breast. We aimed to identify clinicopathological predictors of postoperative upstaging to invasive ductal carcinoma (IDC) in patients preoperatively diagnosed with DCIS. PATIENTS AND METHODS: We retrospectively analyzed patients with DCIS diagnosed through biopsy between April 1, 2010 and December 31, 2014, from 16 institutions. Clinical, radiological, and histological variables were collected from medical records. RESULTS: We identified 2,293 patients diagnosed with DCIS through biopsy, including 1,663 DCIS (72.5%) cases and 630 IDC (27.5%) cases. In multivariate analysis, the presence of a palpable mass (odds ratio [OR] 1.8; 95% confidence interval [CI] 1.2-2.6), mammography findings (≥ category 4; OR 1.8; 95% CI 1.2-2.6), mass formations on ultrasonography (OR 1.8; 95% CI 1.2-2.5), and tumor size on MRI (> 20 mm; OR 1.7; 95% CI 1.2-2.4) were independent predictors of IDC. Among patients with a tumor size on MRI of ≤ 20 mm, the possibility of postoperative upstaging to IDC was 22.1%. Among the 258 patients with non-palpable mass, nuclear grade 1/2, and positive for estrogen receptor, the possibility was 18.1%, even if the upper limit of the tumor size on MRI was raised to ≤ 40 mm. CONCLUSION: We identified four independent predictive factors of upstaging to IDC after surgery among patients with DCIS diagnosed by biopsy. The combined use of various predictors of IDC reduces the possibility of postoperative upstaging to IDC, even if the tumor size on MRI is larger than 20 mm.

DOI： 10.1007/s12282-021-01225-0

Correction to: The Japanese Breast Cancer Society clinical practice guidelines for surgical treatment of breast cancer, 2018 edition.

Masafumi Inokuchi, Goro Kutomi, Yuko Kijima, Takehiko Sakai, Masataka Sawaki, Tadahiko Shien, Noriko Hanamura, Kenji Yano, Noriaki Wada, Shigehira Saji, Hiroji Iwata

Breast cancer (Tokyo, Japan) 28 ( 4 ) 989 - 989 2021年7月

乳癌肺oligometastasisの診断・治療の現状と予後の前向き検討

前田礼奈, 枝園忠彦, 高橋三奈, 河田健吾, 梶原友紀子, 久保慎一郎, 高畠大典, 大谷彰一郎, 松岡欣也, 曳野肇, 小笠原豊, 平成人, 大住省三, 池田雅彦, 土井原博義

日本乳癌学会総会プログラム抄録集 29回 62 - 62 2021年7月

術後卵巣癌の診断となったBRCA変異陽性乳癌の2例

藤原由樹, 枝園忠彦, 前田礼奈, 間森智加, 大谷悠介, 吉岡遼, 鳩野みなみ, 笹原麻子, 梶原友紀子, 河内麻里子, 岩本高行, 平成人, 土井原博義

日本乳癌学会総会プログラム抄録集 29回 52 - 52 2021年7月

乳がん初期治療後の教育・運動プログラムを検証するランダム化比較試験 Quality of Lifeの検討

笹原麻子, 平成人, 河田健吾, 鈴木陽子, 久保慎一郎, 山本真理, 高畠大典, 三好雄一郎, 小笠原豊, 吉富誠二, 原享子, 梶原友紀子, 鳩野みなみ, 河内麻里子, 岩本高行, 枝園忠彦, 池田雅彦, 溝田友里, 山本精一郎, 土井原博義

日本乳癌学会総会プログラム抄録集 29回 56 - 56 2021年7月

乳腺adenomyoepitheloomaの3症例

間森智加, 枝園忠彦, 谷口恒平, 柳内広之, 前田礼奈, 大谷悠介, 吉岡遼, 藤原みわ, 鈴木陽子, 鳩野みなみ, 梶原友妃子, 河内麻里子, 笹原麻子, 岩本高行, 平成人, 土井原博義

日本乳癌学会総会プログラム抄録集 29回 41 - 41 2021年7月

乳がん初期治療後の教育・運動プログラムが、長期的な身体活動に及ぼす影響を検証するランダム化比較試験

河田健吾, 平成人, 鈴木陽子, 久保慎一郎, 山本真理, 高畠大典, 三好雄一郎, 小笠原豊, 吉富誠二, 原享子, 笹原麻子, 梶原友紀子, 鳩野みなみ, 河内麻里子, 岩本高行, 枝園忠彦, 池田雅彦, 溝田友里, 山本精一郎, 土井原博義

日本乳癌学会総会プログラム抄録集 29回 56 - 56 2021年7月

Optimizing the timing of 3.6 mg Pegfilgrastim Administration for Dose-Dense Chemotherapy in Japanese Patients with Breast Cancer.

Daisuke Takabatake, Yukiko Kajiwara, Shoichiro Ohtani, Yoko Suzuki, Mari Yamamoto, Shinichiro Kubo, Masahiko Ikeda, Mina Takahashi, Fumikata Hara, Kenjiro Aogi, Shozo Ohsumi, Yutaka Ogasawara, Yoshitaka Nishiyama, Hajime Hikino, Kinya Matsuoka, Tadahiko Shien, Naruto Taira, Hiroyoshi Doihara

Acta medica Okayama 75 ( 3 ) 357 - 362 2021年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Perioperative dose-dense chemotherapy (DDCT) with pegfilgrastim (Peg) prophylaxis is a standard treatment for high-risk breast cancer. We explored the optimal timing of administration of 3.6 mg Peg, the dose approved in Japan. In the phase II feasibility study of DDCT (adriamycin+cyclophosphamide or epirubicin+cyclophosphamide followed by paclitaxel) for breast cancer, we investigated the feasibility, safety, neutrophil transition, and optimal timing of Peg treatment by administering Peg at days 2, 3, and 4 post-chemotherapy (P2, P3, and P4 groups, respectively). Among the 52 women enrolled, 13 were aged > 60 years. The anthracycline sequence was administered to P2 (n=33), P3 (n=5), and P4 (n=14) patients, and the taxane sequence to P2 (n=38) and P3 (n=6) patients. Both sequences showed no interaction between Peg administration timing and treatment discontinuation, treatment delay, or dose reduction. However, the relative dose intensity (RDI) was significantly different among the groups. The neutrophil count transition differed significantly among the groups receiving the anthracycline sequence. However, the neutrophil count remained in the appropriate range for both sequences in the P2 group. The timing of Peg administration did not substantially affect the feasibility or safety of DDCT. Postoperative day 2 might be the optimal timing for DDCT.

DOI： 10.18926/AMO/62231

A single-arm confirmatory study to evaluate the efficacy of nonsurgical therapy for HER2-positive early breast cancer with clinical complete response after primary systemic therapy (JCOG1806: AMATERAS-BC study).

Tomomi Fujisawa, Tadahiko Shien, Hiroji Iwata, Hideo Shigematsu, Taro Shibata, Keita Sasaki, Yuko Takahashi

JOURNAL OF CLINICAL ONCOLOGY 39 ( 15 ) 2021年5月

A Multicenter Study of Docetaxel at a Dose of 100 mg/m2 in Japanese Patients with Advanced or Recurrent Breast Cancer.

Taizo Hirata, Shinji Ozaki, Masahiro Tabata, Takayuki Iwamoto, Shiro Hinotsu, Akinobu Hamada, Takayuki Motoki, Tomohiro Nogami, Tadahiko Shien, Naruto Taira, Junji Matsuoka, Hiroyoshi Doihara

Internal medicine (Tokyo, Japan) 60 ( 8 ) 1183 - 1190 2021年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：JAPAN SOC INTERNAL MEDICINE

Objective This study examined the pharmacokinetics, safety and anti-tumor activity of docetaxel at a dose of 100 mg/m2 in Japanese patients with advanced or recurrent breast cancer. Methods Japanese patients with advanced or recurrent breast cancer received docetaxel at a dose of 100 mg/m2 intravenously every three weeks. The pharmacokinetics were assessed during the first cycle. The patients were allowed to receive supportive care drugs based on the indications and dosages in Japan. Results Six eligible patients aged 39-65 years old and 27 treatment cycles were analyzed. All patients experienced one or more adverse events (AEs). The common AEs were neutropenia, thrombocytopenia, alopecia, rash, diarrhea, neuropathy (sensory), fatigue, nausea, fever, hypoalbuminemia, alanine transaminase (ALT) increased, constipation, and taste alteration. Grade 3 or 4 AEs included neutropenia, leukopenia, anemia, lymphopenia, decreased appetite, γ-glutamyl transpeptidase (GTP) increased, aspartate transaminase (AST) increased, ALT increased, hypertension and cellulitis which were all reversible. There were no cases of febrile neutropenia, serious AEs or deaths. The median number of cycles was six. Dose reductions were not observed and most cycles were administered at their intended doses. No complete response and three partial responses were observed in four assessable patients with evaluable lesions. The maximum concentration and area under the blood concentration-time curve were 3,417.5 ng/mL and 4.35 μg・hr/mL (mean), respectively. Conclusion Docetaxel at a dose of 100 mg/m2 was tolerable with acceptable safety profiles and effective for Japanese patients with advanced or recurrent breast cancer with appropriate supportive therapies, and pharmacokinetic (PK) profiles which corresponded approximately with the findings of previous clinical studies.

DOI： 10.2169/internalmedicine.5089-20

Risk factors of local recurrence following implant-based breast reconstruction in breast cancer patients. 国際誌

Miwa Fujihara, Rie Yamasaki, Mitsuya Ito, Tadahiko Shien, Reina Maeda, Takanori Kin, Ayako Ueno, Yukiko Kajiwara, Kensuke Kawasaki, Kouichi Ichimura, Hiroya Mihara, Naritaka Kimura, Shoichiro Ohtani

BMC women's health 21 ( 1 ) 147 - 147 2021年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BMC

BACKGROUND: The number of patients desiring implant-based breast reconstruction has been increasing. While local recurrence is observed in patients with breast reconstruction, only a few reports have focused on the risk factors for local recurrence and the prognosis after developing local recurrence. METHODS: We analyzed 387 patients who underwent implant-based breast reconstruction during the period from 2004 to 2017 in Hiroshima City Hospital. We retrospectively examined the risk factors for local recurrence and the outcomes of patients developing such recurrence after implant-based breast reconstruction. RESULTS: The median follow-up time was 59 months. The local recurrence rate was 3.1% (n = 12). The most common reason for detecting local recurrence was a palpable mass. Four patients with local recurrence had recurrence involving the skin just above the primary lesion and needle biopsy tract. All patients with local recurrence received surgery and systemic therapy and most patients received radiation therapy, all have remained free of new recurrence to date. Multivariate analysis showed lymphatic vessel invasion (HR, 6.63; 95% CI, 1.40-31.36; p = 0.017) and positive or < 2 mm vertical margin (HR, 9.72; 95%CI, 1.23-77.13; p = 0.047) to be associated with significantly increased risk of local recurrence. CONCLUSIONS: The risk factors for local recurrence following implant-based breast reconstruction were lymphatic vessel invasion and positive or < 2 mm vertical margin. Removal of the skin just above the primary lesion and needle biopsy tract and adjuvant radiation therapy might improve local outcomes. Patients with local recurrence following implant-based breast reconstruction appear to have good outcomes with appropriate treatment.

DOI： 10.1186/s12905-021-01287-4

Current Status of Advance Care Planning and End-of-life Communication for Patients with Advanced and Metastatic Breast Cancer. 国際誌

Yasuaki Sagara, Masanori Mori, Sena Yamamoto, Keiko Eguchi, Tsuguo Iwatani, Yoichi Naito, Takahiro Kogawa, Kiyo Tanaka, Haruru Kotani, Hiroyuki Yasojima, Yukinori Ozaki, Emi Noguchi, Minoru Miyasita, Naoto Kondo, Naoki Niikura, Masakazu Toi, Tadahiko Shien, Hiroji Iwata

The oncologist 26 ( 4 ) e686-e693 2021年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Advance care planning (ACP) is a process that supports adults in understanding and sharing their personal values, life goals, and preferences regarding future medical care. We examined the current status of ACP and end-of-life (EOL) communication between oncologists and patients with metastatic breast cancer. MATERIALS AND METHODS: We conducted a survey among 41 institutions that specialize in oncology by using an online tool in October 2019. Participants (118 physicians) from 38 institutions completed a 39-item questionnaire that measured facility type and function; physicians' background and clinical approach, education about EOL communication, and understanding about ACP; and the current situation of ACP and EOL discussions. RESULTS: Ninety-eight responses concerning physicians' engagement in ACP with patients were obtained. Seventy-one (72%) answered that they had engaged in ACP. Among these, 23 (33%) physicians used a structured format to facilitate the conversation in their institutions, and only 6 (8%) settled triggers or sentinel events for the initiation of ACP. In the multivariable analysis, only the opportunity to learn communication skills was associated with physicians' engagement with ACP (odds ratio: 2.8, 95% confidence interval: 1.1-7.0). The frequency and timing of communication about ACP and EOL care with patients substantially varied among the oncologists. Communication about patients' life expectancy was less frequent compared with other topics. CONCLUSION: The opportunity to improve EOL communication skills promoted physicians' engagement with ACP among patients with metastatic/advanced breast cancer. However, there were still substantial variabilities in the method, frequency, and timing of ACP and EOL communication among the oncologists. IMPLICATIONS FOR PRACTICE: This study found that the opportunity to improve end-of-life (EOL) communication skills promoted physicians' engagement in advance care planning (ACP) among patients with metastatic/advanced breast cancer. All oncologists who treat said patients are encouraged to participate in effective education programs concerning EOL communication skills. In clinical practice, there are substantial variabilities in the method, frequency, and timing of ACP and EOL communication among oncologists. As recommended in several clinical guidelines, the authors suggest a system that identifies patients who require conversations about their care goals, a structured format to facilitate the conversations, and continuous measurement for improving EOL care and treatment.

DOI： 10.1002/onco.13640

岡山大学外科GRAPESの活動とこれから

竹原裕子, 吉田龍一, 溝尾妙子, 剱持礼子, 小林純子, 新田薫, 工藤由里絵, 元木崇之, 片岡正文, 池田宏国, 菊池覚次, 黒田新士, 枝園忠彦, 山根正修, 小谷恭弘, 大澤晋, 土井原博義, 豊岡伸一, 笠原慎悟, 藤原俊義

日本外科学会定期学術集会抄録集 121回 SF - 5 2021年4月

Current status of PD-1/PD-L1 blockade immunotherapy in breast cancer. 国際誌

Emi Noguchi, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 51 ( 3 ) 321 - 332 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

Over the past 10 years, immunotherapy with immune checkpoint inhibitors has revolutionized the management of various cancers. However, immunotherapy in breast cancer has not been successful. Breast cancer has long been recognized as an immunologically 'cold' tumor, although a higher frequency of tumor-infiltrating lymphocytes present in certain subtypes and an association between tumor-infiltrating lymphocytes and favorable prognosis have been reported. In March 2019, the combination of atezolizumab and nanoparticle albumin-bound paclitaxel was granted accelerated approval in the United States for the treatment of programmed death-ligand 1-positive advanced or metastatic triple-negative breast cancer. This finally opened the door for immune checkpoint blockade therapy for breast cancer. Several clinical trials have been conducted using different combinations of immune checkpoint inhibitors and chemotherapy or targeted agents in various treatment settings for metastatic breast cancer and early-stage breast cancer. In this review, we summarize recent advances in immune checkpoint blockade therapy and predictive biomarkers in breast cancer.

DOI： 10.1093/jjco/hyaa230

Prospective observational study estimating willingness-to-pay for breast cancer treatments through contingent valuation method in Japanese breast cancer patients (JCOG1709A). 国際誌

Tsuguo Iwatani, Fumikata Hara, Tadahiko Shien, Keita Sasaki, Hiroshi Katayama, Haruhiko Fukuda, Takeru Shiroiwa, Hiroji Iwata

Japanese journal of clinical oncology 51 ( 3 ) 498 - 503 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

In April 2016, the Japanese government introduced health technology assessment as a response to rising medical expenses due to 'medical innovation'. This study investigates how Japanese breast cancer patients who received treatment in Japan consider the financial value (willingness-to-pay; WTP) for their life and health by using the contingent valuation method (CVM) prospectively. First, 168 patients (84 primary breast cancer patients and 84 metastatic breast cancer patients) were pre-examined their WTP with dichotomous-choice method survey form. Next, 1,596 patients (798 primary breast cancer patients and 798 metastatic breast cancer patients) will be surveyed to their WTP for hypothetical scenarios in CVM. Based on our results, we will construct an evaluation axis from the patients' viewpoint for the cost-effectiveness of clinical trials to establish standard treatments for breast cancer. We believe this research can contribute to create a meaningful healthcare system for patients, clinicians, industries, and healthcare policymakers.

DOI： 10.1093/jjco/hyaa241

Nuclear grade and comedo necrosis of ductal carcinoma in situ as histopathological eligible criteria for the Japan Clinical Oncology Group 1505 trial: an interobserver agreement study. 国際誌

Hitoshi Tsuda, Masayuki Yoshida, Futoshi Akiyama, Yasuyo Ohi, Keiichi Kinowaki, Nobue Kumaki, Yuzuru Kondo, Akihisa Saito, Eiichi Sasaki, Rieko Nishimura, Satoshi Fujii, Keiichi Homma, Rie Horii, Yuya Murata, Makiko Itami, Sabine Kajita, Hiroyuki Kato, Masafumi Kurosumi, Takashi Sakatani, Shigeki Shimizu, Kohei Taniguchi, Sadafumi Tamiya, Harumi Nakamura, Chizuko Kanbayashi, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 51 ( 3 ) 434 - 443 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

OBJECTIVE: The Japan Clinical Oncology Group 1505 trial is a single-arm multicentre prospective study that examined the possibility of non-surgical follow-up with endocrine therapy for patients with low-grade ductal carcinoma in situ. In that study, the eligible criteria included histopathological findings comprising low to intermediate nuclear grade and absence of comedo necrosis, and cases were entered according to the local histopathological diagnosis. Nuclear grade is largely based on the Consensus Conference criteria (1997), whereas comedo necrosis is judged according to the Rosen's criteria (2017). The purpose of this study was to standardize and examine the interobserver agreement levels of these histopathological criteria amongst the participating pathologists. METHODS: We held slide conferences, where photomicrographs of haematoxylin-eosin-stained slides from 68 patients with ductal carcinoma in situ were presented using PowerPoint. The nuclear grade and comedo necrosis statuses individually judged by the pathologists were analysed using κ statistics. RESULTS: In the first and second sessions, where 22 cases each were presented, the interobserver agreement levels of nuclear grade whether low/intermediate grade or high grade were moderate amongst 29 and 24 participating pathologists, respectively (κ = 0.595 and 0.519, respectively). In the third session where 24 cases were presented, interobserver agreement levels of comedo necrosis or non-comedo necrosis were substantial amongst 25 participating pathologists (κ = 0.753). CONCLUSION: Although the concordance rates in nuclear grade or comedo necrosis were not high in a few of the cases, we believe that these results could provide a rationale for employing the present criteria of nuclear grade and comedo necrosis in the clinical study of ductal carcinoma in situ.

DOI： 10.1093/jjco/hyaa235

Relationships of physical and breast cancer phenotypes with three single-nucleotide polymorphisms (rs2046210, rs3757318, and rs3803662) associated with breast cancer risk in Japanese women.

Kengo Kawada, Naruto Taira, Taeko Mizoo, Yoko Suzuki, Yukiko Kajiwara, Minami Hatono, Takahiro Tsukioki, Mariko Kochi, Yuko Abe, Keiko Nishiyama, Takayuki Iwamoto, Hirokuni Ikeda, Tadahiko Shien, Hiroyoshi Doihara, Setsuko Ishihara, Hiroshi Kawai, Kensuke Kawasaki, Yoichi Ishibe, Yutaka Ogasawara, Shinichi Toyooka

Breast cancer (Tokyo, Japan) 28 ( 2 ) 478 - 487 2021年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Recent genome-wide association studies have shown that many single-nucleotide polymorphisms (SNPs) are associated with breast cancer risk. However, it is often unclear how these SNPs are related to breast cancer. Analysis of associations between SNPs and phenotypes may be important for determining mechanisms of action, including carcinogenesis. METHODS: In previous case-control studies, we found three SNPs (rs2046210, rs3757318, and rs3573318) associated with breast cancer risk in Japanese women. Among these SNPs, two (rs2046210 and rs3757318) are located at 6q25.1, in proximity to the estrogen receptor 1 gene (ESR1). Using data from these studies, we examined associations between factors related to breast cancer risk, such as height, weight, and breast density, and the three SNPs in cases and controls. We also investigated whether the SNPs correlated with breast cancer features, such as estrogen receptor (ER), progesterone receptor (PgR), and human epidermal growth factor receptor type-2 (HER2) status, and clinical stage. RESULTS: There was a significant difference in mean height between risk and non-risk allele carriers for rs2046210 (156.0 ± 5.8 vs. 154.3 ± 5.5 cm, p = 0.002), and rs3757318 (155.8 ± 5.7 vs. 154.7 ± 5.6 cm, p = 0.035) in cases, but no significant associations between height and these SNPs in controls. There was also a significant difference in breast density between risk and non-risk allele carriers for rs2046210 (p = 0.040) and rs3757318 (p = 0.044) in cases. rs2046210 and rs3757318 risk allele carriers tended to have higher breast density in all subjects and in controls. In cases, rs3757318 risk allele carriers were also significantly more likely to be ER-negative compared to non-risk allele carriers (ER-positive rate: 77% vs. 84%, p = 0.036). CONCLUSIONS: SNPs rs2046210 and rs3757318, which are associated with breast cancer risk in Japanese women, were significantly associated with height and high breast density, and this association was particularly strong in those with breast cancer. These findings suggest that SNPs in the ESR1 gene region affect phenotypes such as height and breast density.

DOI： 10.1007/s12282-020-01185-x

Estimation of willingness-to-pay for breast cancer treatments through contingent valuation method in Japanese breast cancer patients (JCOG1709A); preliminary study findings

Tsuguo Iwatani, Fumikata Hara, Tadahiko Shien, Masato Takahashi, Norikazu Masuda, Hiroyuki Yasojima, Yasuaki Sagara, Tomonori Mizutani, Keita Sasaki, Kenichi Nakamura, Haruhiko Fukuda, Takaru Shiroiwa, Hiroji Iwata

CANCER RESEARCH 81 ( 4 ) 2021年2月

Effect of isoflavones on breast cancer cell development and their impact on breast cancer treatments. 国際誌

Minami Hatono, Hirokuni Ikeda, Yoko Suzuki, Yukiko Kajiwara, Kengo Kawada, Takahiro Tsukioki, Mariko Kochi, Ken Suzawa, Takayuki Iwamoto, Hiromasa Yamamoto, Tadahiko Shien, Masaomi Yamane, Naruto Taira, Hiroyoshi Doihara, Shinichi Toyooka

Breast cancer research and treatment 185 ( 2 ) 307 - 316 2021年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

PURPOSE: Epidemiological studies have suggested that intake of soy isoflavones is associated with a reduced risk of development of breast cancer and an improved prognosis in patients with breast cancer. In addition, basic research has demonstrated the antitumor effects of these compounds on breast cancer cell lines. However, the detailed effects of the intake of equol, which is one of the metabolites of the soy isoflavones, are yet to be clarified on the risk of development and recurrence of breast cancer and its interactions with drugs used for treating breast cancer. This study aimed to determine the antitumor effects of equol and investigate the impact of adding equol to therapeutic agents for breast cancer using breast cancer cell lines. METHODS: We examined the antitumor effect of equol on breast cancer cell lines using MTS assay. We also studied the combined effect of equol and the existing hormonal or chemotherapeutic agents using combination index. We evaluated the expressions of the related proteins by Western blot analysis and correlated the findings with the antitumor effect. RESULTS: Equol showed bi-phasic protumor and antitumor effects; at a low concentration, it promoted the tumor growth in hormone receptor-positive cell lines, whereas antitumor effects were generally observed when an excessive amount of dose unexpected in the blood and the tissue was administered. When used with tamoxifen, equol might have some antagonistic effect, although it depends on equol concentration and the type of cancer cells. CONCLUSIONS: We confirmed that equol has dual action, specifically a tumor growth-promoting effect and an antitumor effect. Although the results suggested that equol might exert an antagonistic effect against tamoxifen depending on the concentration, equol did not exert an antagonistic effect on other therapeutic agents.

DOI： 10.1007/s10549-020-05957-z

Evaluation of Prognosis of Juvenile Differentiated Thyroid Carcinoma.

Takahiro Tsukioki, Tadahiko Shien, Yusuke Ohtani, Miwa Fujihara, Yoko Suzuki, Yukiko Kajihara, Minami Hatono, Kengo Kawada, Mariko Kochi, Takayuki Iwamoto, Hirokuni Ikeda, Naruto Taira, Hiroyoshi Doihara

Acta medica Okayama 74 ( 5 ) 401 - 406 2020年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

Differentiated thyroid carcinoma (DTC) in juvenile patients is often an extensive and aggressive disease with a high frequency of recurrence. However, the prognosis is excellent, with a low mortality rate even when advanced disease is present, although prognostic factors and treatment strategy remain uncertain. Between April 2004 and March 2017, 33 juvenile patients (< 30 years old) were diagnosed with DTC and treated at our institution. We retrospectively investigated prognosis and factors including sex, reason for discovery, treatment, pathological factors and treatment progress to clarify the risk factors. All patients underwent curative surgical treatment. Pathologically, lymph node metastasis was identified in 25 patients (75%). Thirteen patients (39%) had bilateral cervical metastasis. In addition, 9 (27%) had more than 10 metastatic lymph nodes. The 2 patients with more than 20 metastatic lymph nodes were treated with radioactive iodine (RAI). Five patients (15%) had local recurrences and received surgery. There have been no further recurrences or deaths. However, no factors were determined to significantly predict the recurrence of juvenile DTC. Local recurrent disease was treated with surgery and/or RAI until remission, and survival was excellent in juvenile DTC.

DOI： 10.18926/AMO/60799

原発性乳癌に対する術前化学放射線療法の病理学的効果判定法の検討(JCOG0306A1)

枝園忠彦, 津田均, 佐々木啓太, 水澤純基, 秋山太, 黒住昌史, 澤木正孝, 田村宜子, 田中希世, 古川孝広, 高橋三奈, 林直輝, 向井博文, 増田慎三, 岩田広治

日本癌治療学会学術集会抄録集 58回 O51 - 4 2020年10月

The efficacy of sequential second-line endocrine therapies (ETs) in postmenopausal estrogen receptor-positive and HER2-negative metastatic breast cancer patients with lower sensitivity to initial ETs. 査読

Takayuki Iwamoto, Tomomi Fujisawa, Tadahiko Shien, Kazuhiro Araki, Kentaro Sakamaki, Takafumi Sangai, Yuichiro Kikawa, Shintaro Takao, Reiki Nishimura, Masato Takahashi, Tomohiko Aihara, Hirofumi Mukai, Naruto Taira

Breast cancer (Tokyo, Japan) 27 ( 5 ) 973 - 981 2020年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

PURPOSE: Second-line endocrine therapy (ET) for estrogen receptor (ER)-positive and human epidermal growth factor 2 (HER2)-negative metastatic breast cancer (MBC) is offered based on the response to first-line ET. However, no clinical trials have evaluated the efficacy and safety of secondary ETs in patients with poor responses to initial ET. This study evaluated the efficacy of second-line ET in ER-positive and HER2-negative postmenopausal MBC patients with low or very low sensitivity to initial ET. METHODS: This multicenter prospective observational cohort study evaluated the response of 49 patients to second-line ETs in postmenopausal MBC patients with low or very low sensitivity to initial ET. The primary endpoint was the clinical benefit rate (CBR) for 24 weeks. RESULTS: Of the 49 patients assessed, 40 (82%) received fulvestrant in the second line, 5 (10%) received selective estrogen receptor modulators, 3 (6%) received aromatase inhibitors (AIs) alone, and 1 received everolimus with a steroidal AI. The overall CBR was 44.9% [90% confidence interval (CI): 34.6-57.6, p = 0.009]; CBR demonstrated similar significance across the progesterone receptor-positive (n = 39, 51.3%, 90% CI: 39.6-65.2, p = 0.002), very low sensitivity (n = 17, 58.8%, 90% CI: 42.0-78.8, p = 0.003), and non-visceral metastases (n = 25, 48.0%, 90% CI: 34.1-65.9, p = 0.018) groups. The median progression-free survival was 7.1 months (95% CI: 5.6-10.6). CONCLUSION: Second-line ET might be a viable treatment option for postmenopausal patients with MBC with low and very low sensitivity to initial ET. Future studies based on larger and independent cohorts are needed to validate these findings.

DOI： 10.1007/s12282-020-01095-y

Overcoming epithelial-mesenchymal transition-mediated drug resistance with monensin-based combined therapy in non-small cell lung cancer. 査読国際誌

Kosuke Ochi, Ken Suzawa, Shuta Tomida, Kazuhiko Shien, Jui Takano, Shunsaku Miyauchi, Tatsuaki Takeda, Akihiro Miura, Kota Araki, Kentaro Nakata, Hiromasa Yamamoto, Mikio Okazaki, Seiichiro Sugimoto, Tadahiko Shien, Masaomi Yamane, Kazuo Azuma, Yoshiharu Okamoto, Shinichi Toyooka

Biochemical and biophysical research communications 529 ( 3 ) 760 - 765 2020年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The epithelial-mesenchymal transition (EMT) is a key process in tumor progression and metastasis and is also associated with drug resistance. Thus, controlling EMT status is a research of interest to conquer the malignant tumors. MATERIALS AND METHODS: A drug repositioning analysis of transcriptomic data from a public cell line database identified monensin, a widely used in veterinary medicine, as a candidate EMT inhibitor that suppresses the conversion of the EMT phenotype. Using TGF-β-induced EMT cell line models, the effects of monensin on the EMT status and EMT-mediated drug resistance were assessed. RESULTS: TGF-β treatment induced EMT in non-small cell lung cancer (NSCLC) cell lines and the EGFR-mutant NSCLC cell lines with TGF-β-induced EMT acquired resistance to EGFR-tyrosine kinase inhibitor. The addition of monensin effectively suppressed the TGF-β-induced-EMT conversion, and restored the growth inhibition and the induction of apoptosis by the EGFR-tyrosine kinase inhibitor. CONCLUSION: Our data suggested that combined therapy with monensin might be a useful strategy for preventing EMT-mediated acquired drug resistance.

DOI： 10.1016/j.bbrc.2020.06.077

Loco-regional therapy for metastatic breast cancer

Tadahiko Shien, Kaori Terata

TRANSLATIONAL CANCER RESEARCH 9 ( 8 ) 5026 - 5027 2020年8月

The activation of YES1 leads to the acquired resistance to neratinib in HER2-amplified breast and lung cancers

Hiromasa Yamamoto, Tatsuaki Takeda, Ken Suzawa, Shuta Tomida, Shunsaku Miyauchi, Kota Araki, Kentaro Nakata, Akihiro Miura, Tadahiko Shien, Yoshihisa Kitamura, Toshiaki Sendo, Shinichi Toyooka

CANCER RESEARCH 80 ( 16 ) 2020年8月

Effect of local surgery on outcomes of stage IV breast cancer

Takahiro Tsukioki, Tadahiko Shien, Hiroyoshi Doihara

TRANSLATIONAL CANCER RESEARCH 9 ( 8 ) 5102 - + 2020年8月

記述言語：英語出版者・発行元：AME PUBL CO

Metastatic breast cancer (MBC), including de novo stage IV, is regarded as being incurable and the mainstay of clinical management is systemic therapy. Traditionally, locoregional surgery is performed only for local control, such as to prevent ulceration and bleeding. In recent years, however, both retrospective and prospective studies have demonstrated the prognostic efficacy of primary surgery for de novo stage IV patients. Therefore, we conducted a meta-analysis to evaluate whether surgical therapy contributes to overall survival (OS) extension. We searched for clinical trials published in electronic databases (PubMed, Embase, and the Cochrane databases) and performed a meta-analysis of the data collected. There were five prospective randomized controlled phase III trials (RCTs). The results of three have been reported. According to our meta-analysis of these RCTs, primary surgery for de novo stage IV breast cancer patients significantly improves OS. However, the Tata trial showed that systemic therapy does not achieve a sufficient effect. Another trial, conducted in Turkey, had statistical shortcomings and patient randomization was not adequately performed The ABCSG (Austrian Breast and Colorectal Cancer Study Group) trial had too few subjects. Meta-analysis of 12 retrospective studies showed that patients with stage IV breast cancer receiving surgery as the initial treatment experienced longer OS (HR: 0.65, P<0.00001). Based on our meta-analysis of three reported 'RCTs, surgery as the primary treatment does not significantly impact the outcomes of de novo stage IV breast cancer patients. However, these trials had limitations. We await the results of the remaining two ongoing RCTs (ECOG 2108 and JCOG 1017). These trials are anticipated to resolve current controversies and provide many eagerly awaited answers.

DOI： 10.21037/tcr.2020.01.60

Influences of preoperative metformin on immunological factors in early breast cancer. 国際誌

Takahiro Tsukioki, Tadahiko Shien, Takehiro Tanaka, Yoko Suzuki, Yukiko Kajihara, Minami Hatono, Kengo Kawada, Mariko Kochi, Takayuki Iwamoto, Hirokuni Ikeda, Naruto Taira, Hiroyoshi Doihara, Shinichi Toyooka

Cancer chemotherapy and pharmacology 86 ( 1 ) 55 - 63 2020年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Metformin has been suggested to possibly reduce cancer risk. However, the mechanism underlying the positive effects of metformin on cancer treatment remains unclear. We conducted a prospective study to evaluate the effects of preoperative metformin in patients with early breast cancer. METHOD: We evaluated the effects on immunological factors (TILs, CD4 + , CD8 + , PD-L1, IFNγ and IL-2) by comparing core needle biopsies (CNB) obtained before metformin treatment with surgical specimens. Seventeen patients were enrolled in this prospective study from January to December 2016. We also analyzed 59 patients undergoing surgery during the same period to reveal the correlation of immune factors between CNB and surgical specimen. RESULT: There was a moderate correlation between CNB and surgical specimens on TILs and CD8 + lymphocyte. (TILs Rs = 0.63, CD4 + Rs = 0.224, CD8 + Rs = 0.42) In the metformin group, TILs increases were confirmed in five (29%) patients, while a decrease was confirmed in two (12%). The expressions of CD4 + and CD8 + by TILs were increased in 41% and 18% of surgical specimens, respectively. However, TILs number (p = 0.0554), CD4+ (p = 0.0613) and CD8 + (p = 0.0646) expressions did not significantly increased. Furthermore, IFNγ expression appeared to be increased in response to metformin (p = 0.08). CONCLUSION: Preoperative metformin tends to increase TILs, as well as the numbers of CD4 and CD8 positive lymphocytes, and IFNγ levels. Metformin might improve immune function and have a possibility of chemo-sensitivity and thereby increase the effectiveness of immunotherapy, based on the results of this preliminary study.

DOI： 10.1007/s00280-020-04092-2

Omitting surgery for early breast cancer showing clinical complete response to primary systemic therapy. 国際誌

Hideo Shigematsu, Tomomi Fujisawa, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 50 ( 6 ) 629 - 634 2020年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Breast cancer is highly sensitive to systemic therapy. High probability of pathological complete response suggests a clinical question that omitting surgery is an effective alternative to surgery in breast cancer showing clinical complete response to primary systemic therapy. However, the validity of omitting surgery for early breast cancer after primary systemic therapy has not been sufficiently established; thus, even if pathological complete response is expected in patients showing clinical complete response, excision of the primary tumor site remains the standard treatment of breast cancer. Inappropriate omitting surgery increases the incidence of local recurrence, which can be the risk of a subsequent distant metastasis and reduced overall survival. To achieve acceptable local control rate, omitting surgery should be investigated in patients with early breast cancer where a high percentage of pathological complete response, a high concordance rate between clinical complete response and pathological complete response and an acceptable local control rate are expected. This review presents concept and ongoing clinical trials for omitting surgery for patients with breast cancer showing clinical complete response to primary systemic therapy.

DOI： 10.1093/jjco/hyaa055

Evaluation of Therapeutic Target Gene Expression Based on Residual Cancer Burden Classification After Neoadjuvant Chemotherapy for HER2-Negative Breast Cancer. 国際誌

Yuko Takahashi, Takayuki Iwamoto, Yoko Suzuki, Yukiko Kajiwara, Minami Hatono, Takahiro Tsukioki, Kengo Kawada, Mariko Kochi, Hirokuni Ikeda, Tadahiko Shien, Naruto Taira, Junji Matsuoka, Hiroyoshi Doihara, Shinichi Toyooka

Clinical breast cancer 20 ( 2 ) 117 - 124 2020年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: Patients with residual disease usually have a poor prognosis after neoadjuvant chemotherapy for breast cancer. The aim of this study was to explore therapeutic targets and potential additional adjuvant treatments for patients with residual disease after standard neoadjuvant chemotherapy. PATIENTS AND METHODS: We retrieved publicly available complementary DNA microarray data from 399 human epidermal growth factor receptor 2 (HER2)-negative primary breast cancer samples from patients who underwent standard neoadjuvant chemotherapy. We analyzed the messenger RNA (mRNA) expression levels of key breast cancer markers and therapeutic target genes according to residual cancer burden (RCB) classification: RCB-0/I, RCB-II, and RCB-III. RESULTS: Among hormone receptor-positive samples, there were more luminal A tumors by PAM50 (Prediction Analysis of Microarray 50 [Prosigna], aka Prosigna Breast Cancer Prognostic Gene Signature Assay) in RCB-III than in RCB-0/I and RCB-II (P < .01). The mRNA expressions of ESR1 and PGR were significantly higher, and that of MKI67 was lower in RCB-II and RCB-III than in RCB-0/I. The mRNA expression of cyclin D1 was up-regulated in RCB-III and that of CDKN2A was down-regulated in RCB-III (P = .027 and < .01). Among triple-negative (TN) samples, RCB-III had higher clinical stage and more lymph node-positive samples than RCB-0/1 and RCB-II (P < .01). In both subtypes, VEGF-C expression was significantly higher in RCB-III than in RCB-0/I and RCB-II. CONCLUSION: In hormone receptor-positive breast cancer, biological features such as luminal A were associated with RCB; this trend was not observed in TN breast cancer. Further, some targeted therapies should be tested as new strategies after standard neoadjuvant chemotherapy in future clinical trials.

DOI： 10.1016/j.clbc.2019.07.001

Adjuvant and neoadjuvant therapy for breast cancer. 国際誌

Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 50 ( 3 ) 225 - 229 2020年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

Systemic therapies for operable breast cancer patients have improved outcomes and have thus become standard treatments. Recently, new molecular target drugs and regimens are being developed based on the predicted sensitivity for specific breast cancer histological types. Systemic therapy is selected according to recurrence risk, with the treatment for low-risk patients being de-escalated, while high-risk patients receive aggressive systemic treatment with an adequate dose and duration. Neoadjuvant systemic therapy has a different aim. The efficacy of systemic therapies, based on the sensitivities to drugs, is supported by improvements in the rate of breast-conserving therapy. The response to neoadjuvant systemic therapy is the most important factor for predicting outcomes and selecting the optimal adjuvant therapy. Novel biological markers unique to individual patients allow appropriate targeted therapy, which can achieve optimal efficacy.

DOI： 10.1093/jjco/hyz213

YES1 activation induces acquired resistance to neratinib in HER2-amplified breast and lung cancers. 査読国際誌

Tatsuaki Takeda, Hiromasa Yamamoto, Ken Suzawa, Shuta Tomida, Shunsaku Miyauchi, Kota Araki, Kentaro Nakata, Akihiro Miura, Kei Namba, Kazuhiko Shien, Junichi Soh, Tadahiko Shien, Yoshihisa Kitamura, Toshiaki Sendo, Shinichi Toyooka

Cancer science 111 ( 3 ) 849 - 856 2020年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

Molecular-targeted therapies directed against human epidermal growth factor receptor 2 (HER2) are evolving for various cancers. Neratinib is an irreversible pan-HER tyrosine kinase inhibitor and has been approved by the FDA as an effective drug for HER2-positive breast cancer. However, acquired resistance of various cancers to molecular-targeted drugs is an issue of clinical concern, and emergence of resistance to neratinib is also considered inevitable. In this study, we established various types of neratinib-resistant cell lines from HER2-amplified breast and lung cancer cell lines using several drug exposure conditions. We analyzed the mechanisms of emergence of the resistance in these cell lines and explored effective strategies to overcome the resistance. Our results revealed that amplification of YES1, which is a member of the SRC family, was amplified in two neratinib-resistant breast cancer cell lines and one lung cancer cell line. Knockdown of YES1 by siRNA and pharmacological inhibition of YES1 by dasatinib restored the sensitivity of the YES1-amplified cell lines to neratinib in vitro. Combined treatment with dasatinib and neratinib inhibited tumor growth in vivo. This combination also induced downregulation of signaling molecules such as HER2, AKT and MAPK. Our current results indicate that YES1 plays an important role in the emergence of resistance to HER2-targeted drugs, and that dasatinib enables such acquired resistance to neratinib to be overcome.

DOI： 10.1111/cas.14289

Influence of breast density on breast cancer risk: a case control study in Japanese women.

Keiko Nishiyama, Naruto Taira, Taeko Mizoo, Mariko Kochi, Hirokuni Ikeda, Takayuki Iwamoto, Tadahiko Shien, Hiroyoshi Doihara, Setuko Ishihara, Hiroshi Kawai, Kensuke Kawasaki, Yoichi Ishibe, Yutaka Ogasawara, Shinichi Toyooka

Breast cancer (Tokyo, Japan) 27 ( 2 ) 277 - 283 2020年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Mammography is the standard examination for breast cancer screening of woman aged ≥ 40 years. High breast density on mammography indicates that mammary gland parenchyma occupy a high percentage of the breast. The objective of this study was to investigate factors associated with breast density and the risk of high breast density for breast cancer. METHODS: A multicenter case-control study was performed in 530 patients and 1043 controls. Breast density was classified as C1-C4 using the Breast Imaging Reporting and Data System (BI-RADS). Clinical factors were obtained from questionnaires or medical records, and the influence of each factor (breast density, menopausal status, body mass index (BMI), parity, presence or absence of breastfeeding history, age at menarche, age at first birth, and familial history of breast cancer) on breast cancer risk in all patients was calculated as an age-adjusted odds ratio (OR). Multivariate logistic regression analyses were then performed in all patients and in pre- and postmenopausal and BMI-stratified groups using factors with a significant age-adjusted OR as adjustment factors. RESULTS: Age-adjusted ORs for breast cancer were significant for breast density, BMI, parity, and breast feeding, but not for age at menarche, age at first birth, or family history of breast cancer. In multivariate analysis, there was a significant correlation between breast density and breast cancer in postmenopausal women (OR for C1 vs. C2 1.90 [95% CI 1.34-2.70]; C1 vs. C4 2.85 [95% CI 1.10-7.16]). This correlation was also significant in patients in the third BMI quartile (22.3-24.5 kg/m2) (OR for C1 vs. C4 8.76 [95% CI 2.38-42.47]); and fourth BMI quartile (>24.5 kg/m2) (OR for C1 vs. C2 1.92 [95% CI 1.17-3.15]; C1 vs. C4 11.89 [95% CI 1.56-245.17]). CONCLUSION: Breast density on mammography is a risk factor for breast cancer after adjustment for other risk factors. This risk is particularly high in postmenopausal women and those with a high BMI.

DOI： 10.1007/s12282-019-01018-6

Gene expression profiling of breast cancers between high and low Ki-67 after short-term preoperative hormone therapy among hormone receptor-positive / human epidermal growth factor receptor 2-negative breast cancers with high Ki-67

Yukiko Kajiwara, Takayuki Iwamoto, Yusuke Otani, Miwa Fujihara, Yoko Suzuki, Minami Hatono, Takahiro Tsukioki, Kengo Kawada, Mariko Kochi, Hirokuni Ikeda, Tadahiko Shien, Naruto Taira, Hiroyoshi Doihara

CANCER RESEARCH 80 ( 4 ) 2020年2月

Estimation of willingness-to-pay for breast cancer treatments through contingent valuation method in Japanese breast cancer patients (JCOG1709A)

Tsuguo Iwatani, Fumikata Hara, Hiroji Iwata, Tadahiko Shien, Takashi Hojo, Yasuaki Sagara, Norikazu Masuda, Masato Takahashi, Shigehira Saji, Tomomi Fujisawa, Naoto Kondo, Akihiko Shimomura

CANCER RESEARCH 80 ( 4 ) 2020年2月

Validation study of the Emoji scale in evaluating patient reported outcomes for breast cancer patients

Yoko Suzuki, Naruto Taira, Yukiko Kajiwara, Mariko Kochi, Takayuki Iwamoto, Hirokuni Ikeda, Tadahiko Shien, Hiroyoshi Doihara, Yuichiro Kikawa, Yukari Uemura

CANCER RESEARCH 80 ( 4 ) 2020年2月

Recurring radiation-induced angiosarcoma of the breast that was treated with paclitaxel chemotherapy: a case report. 国際誌

Yoko Suzuki, Kohei Taniguchi, Minami Hatono, Yukiko Kajiwara, Yuko Abe, Kengo Kawada, Takahiro Tsukioki, Mariko Kochi, Keiko Nishiyama, Takayuki Iwamoto, Hirokuni Ikeda, Tadahiko Shien, Naruto Taira, Masahiro Tabata, Hiroyuki Yanai, Hiroyoshi Doihara

Surgical case reports 6 ( 1 ) 25 - 25 2020年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: Angiosarcoma of the breast is very rare and can be divided into primary and secondary angiosarcoma. Radiation-induced angiosarcoma (RIAS) is classified as secondary angiosarcoma. Diagnosis of RIAS is difficult due to its rarity, and the interpretation of pathological imaging is complicated. In the National Comprehensive Care Network (NCCN) guidelines, the first choice of treatment is surgery with negative margins. Adjuvant radiotherapy (RT) for close soft tissue margins should be considered. Preoperative or adjuvant chemotherapy of nonmetastatic disease is not recommended for angiosarcoma. We report a case of RIAS, which was impossible to diagnose with core needle biopsy (CNB) but was diagnosed by excisional biopsy. The patient was then administered adjuvant chemotherapy using conjugated paclitaxel (PTX). CASE PRESENTATION: A 62-year-old woman noticed a tumor in her right breast. She had a history of right breast cancer and had undergone breast-conserving surgery, RT, and tamoxifen therapy 8 years previously. CNB, which was performed twice, was inconclusive. The tumor was surgically excised and pathological analysis yielded a diagnosis of angiosarcoma. She then underwent a right mastectomy. One month after she underwent right mastectomy, a nodule reappeared on the skin of her right breast, and excisional biopsy revealed recurrence of angiosarcoma. A few weeks later another nodule reappeared near the post-operative scar and excisional biopsy revealed recurrence of angiosarcoma. We assumed that surgical therapy was insufficient because the patient experienced relapse of angiosarcoma after complete mastectomy. After the second recurrence, we treated her with systemic chemotherapy using PTX. There was no evidence of recurrence 8 months after chemotherapy. CONCLUSION: Although angiosarcoma is difficult to diagnose, many patients have a poor prognosis. Therefore, prompt treatment intervention is desired. Moreover, there is little evidence regarding adjuvant therapy of angiosarcoma since it is a rare disease. We consider that adjuvant therapy helped to effectively prevent recurrence in the patient after complete excision.

DOI： 10.1186/s40792-020-0790-7

The Japanese Breast Cancer Society clinical practice guidelines for surgical treatment of breast cancer, 2018 edition. 査読

Masafumi Inokuchi, Goro Kutomi, Yuko Kijima, Takehiko Sakai, Masataka Sawaki, Tadahiko Shien, Noriko Hanamura, Kenji Yano, Noriaki Wada, Shigehira Saji, Hiroji Iwata

Breast cancer (Tokyo, Japan) 27 ( 1 ) 4 - 8 2020年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

We have prepared the Japanese Breast Cancer Society clinical practice guidelines (CPGs) for surgical treatment of breast cancer, 2018 update after a systematic review (SR) of the literature based upon the Medical Information Network Distribution Service (Minds) procedure. The CPG committee for surgical treatment of breast cancer, composed of breast surgeons and plastic surgeons treating breast cancer, has developed the CPGs. Eight clinical questions (CQs) were selected and divided roughly into the following five categories: (1) breast surgery in initial therapy (CQs 1-3); (2) axillary surgery in initial therapy (CQs 4-5); (3) breast reconstruction in initial therapy (CQ 6); (4) surgical treatment for recurrent and metastatic breast cancer (CQs 7-8); and (5) others. Recommendations for these CQs were decided by the GRADE grid method. In addition, 4 outlines, 14 background questions (BQs), and 12 future research questions (FQs) were also selected. Statements for these BQs and FQs are provided. We developed the updated CPGs for surgical treatment of breast cancer, 2018, which include 8 CQs and recommendations. As a decision-making tool for the understanding and treatment of breast cancer, these guidelines will help surgical oncologists dealing with breast cancer, medical staff, and patients, along with their family members.

DOI： 10.1007/s12282-019-01030-w

HEALTH-RELATED QUALITY OF LIFE IN 2ND-LINE ENDOCRINE THERAPY FOR PATIENTS WITH ACQUIRED ENDOCRINE-RESISTANT POSTMENOPAUSAL ER-POSITIVE, HER2-NEGATIVE METASTATIC BREAST CANCER: THE HORSE-BC STUDY

Yuichiro Kikawa, Kentaro Sakamaki, Tomomi Fujisawa, Kazuhiro Araki, Takayuki Iwamoto, Takafumi Sangai, Tadahiko Shien, Shintaro Takao, Reiki Nishimura, Masato Takahashi, Tatsuya Toyama, Tomohiko Aihara, Hirofumi Mukai, Naruto Taira

BREAST 48 S72 - S73 2019年11月

Distinct gene expression profiles between primary breast cancers and brain metastases from pair-matched samples. 国際誌

Takayuki Iwamoto, Naoki Niikura, Rin Ogiya, Hiroyuki Yasojima, Ken-Ichi Watanabe, Chizuko Kanbayashi, Michiko Tsuneizumi, Akira Matsui, Tomomi Fujisawa, Tsutomu Iwasa, Tadahiko Shien, Shigehira Saji, Norikazu Masuda, Hiroji Iwata

Scientific reports 9 ( 1 ) 13343 - 13343 2019年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：NATURE PUBLISHING GROUP

Our objectives were to determine whether clinic-pathological markers and immune-related gene signatures in breast cancer exhibit any change upon brain metastasis and whether previously reported genes significantly associated with brain metastases and the epithelial-mesenchymal transition (EMT) were reproducible and consistent in our dataset. Sixteen pair-matched samples from primary breast cancers and brain metastases diagnosed were collected from the Japan Clinical Oncology Group Breast Cancer Study Group. Gene expression profiles for immune-, brain metastases-, and EMT-related genes were compared between primary breast cancers and brain metastases. Potential therapeutic target genes of 41 FDA-approved or under-investigation agents for brain metastases were explored. Immune-related signatures exhibited significantly lower gene expression in brain metastases than in primary breast cancers. No significant differences were detected for the majority of genes associated with brain metastases and EMT in the two groups. Among 41 therapeutic target candidates, VEGFA and DNMT3A demonstrated significantly higher gene expression in brain metastases. We found that distinct patterns of gene expression exist between primary breast cancers and brain metastases. Further studies are needed to explore whether these distinct expression profiles derive from or underlie disease status and compare these features between metastases to the brain and other sites.

DOI： 10.1038/s41598-019-50099-y

非小細胞肺癌におけるモネンシン併用療法によるEMT関連薬剤耐性の克服(Overcoming EMT-mediated drug resistance with Monensin-based combined therapy in non-small cell lung cancer)

大智宏祐, 諏澤憲, 冨田秀太, 荒木恒太, 宮内俊策, 三浦章博, 武田達明, 難波圭, 枝園和彦, 山本寛斉, 岡崎幹生, 枝園忠彦, 豊岡伸一

日本癌学会総会記事 78回 P - 1139 2019年9月

The influences of preoperative metformin on immunological factors in early breast cancer.

Takahiro Takahiro, Tadahiko Shien, Naruto Taira, Mariko Kochi, Takayuki Iwamoto, Hiroyoshi Doihara, Heiichiro Udono, Shinichi Toyooka

JOURNAL OF CLINICAL ONCOLOGY 37 ( 15 ) 2019年5月

The international collaboration of active surveillance trials for low-risk DCIS (LORIS, LORD, COMET, LORETTA).

Chizuko Kanbayashi, Alastair Mark Thompson, Eun-Sil Shelley Hwang, Ann H. Partridge, Daniel William Rea, Jelle Wesseling, Tadahiko Shien, Tomonori Mizutani, Taro Shibata, Hiroji Iwata

JOURNAL OF CLINICAL ONCOLOGY 37 ( 15 ) 2019年5月

Ganetespib in Epidermal Growth Factor Receptor-Tyrosine Kinase Inhibitor-resistant Non-small Cell Lung Cancer. 査読国際誌

Eisuke Kurihara, Kazuhiko Shien, Hidejiro Torigoe, Tatsuaki Takeda, Yuta Takahashi, Yusuke Ogoshi, Takahiro Yoshioka, Kei Namba, Hiroki Sato, Ken Suzawa, Hiromasa Yamamoto, Junichi Soh, Mikio Okazaki, Tadahiko Shien, Shuta Tomida, Shinichi Toyooka

Anticancer research 39 ( 4 ) 1767 - 1775 2019年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：INT INST ANTICANCER RESEARCH

BACKGROUND: The 90-kDa heat-shock protein (HSP90) is a chaperone protein expressed at high levels in cancer cells and is involved in the folding or stabilization of several client proteins, including epidermal growth factor receptor (EGFR). Ganetespib is a second-generation HSP90 inhibitor with a potent antitumor effect against various cancer types. MATERIALS AND METHODS: This study examined the antitumor effect of ganetespib in EGFR-mutant non-small cell lung cancer (NSCLC) cells and experimentally established EGFR-tyrosine kinase inhibitor (TKI)-resistant cells harboring various resistance mechanisms, including EGFR T790M mutation, met proto-oncogene amplification, and epithelial-mesenchymal transition. RESULTS: Ganetespib showed a potent antitumor effect at low concentrations, suppressing EGFR-related downstream pathway molecules and inducing cleavage of poly ADP-ribose polymerase in all examined EGFR-TKI-resistant cell lines in vitro. Ganetespib also inhibited in vivo tumor growth in resistant cells harboring EGFR T790M. CONCLUSION: Ganetespib might be a promising therapeutic option for the treatment of patients with EGFR-TKI-resistant NSCLC.

DOI： 10.21873/anticanres.13283

TNM classification of malignant tumors (Breast Cancer Study Group). 査読国際誌

Masataka Sawaki, Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 49 ( 3 ) 228 - 231 2019年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

The eighth editions of the primary tumor, lymph node and metastasis classifications for breast cancer issued by the American Joint Commission of Cancer and the Union for International Cancer Control were revised in 2017. The major change made by the American Joint Commission of Cancer is to incorporate biological factors such as estrogen and progesterone receptor, human epidermal growth factor receptor 2, histological grade and multigene prognostic assays, into the staging system. Tumor biomarkers and low recurrence scores confirmed by multigene prognostic assays change the staging. Minor changes are to add the post-neoadjuvant therapy clinical and pathological classification and to define the size of tumor, lymph node and metastasis components more precisely. Little has changed in the Union for International Cancer Control. We have identified key points of change in both eighth editions of the tumor, lymph node and metastasis classifications and we discuss possible problems which may arise when they are adopted in Japanese practice, as well as future directions.

DOI： 10.1093/jjco/hyy182

Impact of breast surgery in de novo stage IV breast cancer

Tadahiko Shien

TRANSLATIONAL CANCER RESEARCH 8 S118 - S119 2019年3月

Associations in tumor infiltrating lymphocytes between clinicopathological factors and clinical outcomes in estrogen receptor-positive/human epidermal growth factor receptor type 2 negative breast cancer. 査読国際誌

Yuichiro Miyoshi, Tadahiko Shien, Akiko Ogiya, Naoko Ishida, Kieko Yamazaki, Rie Horii, Yoshiya Horimoto, Norikazu Masuda, Hiroyuki Yasojima, Touko Inao, Tomofumi Osako, Masato Takahashi, Nobumoto Tomioka, Yumi Wanifuchi-Endo, Mitsuchika Hosoda, Hiroyoshi Doihara, Hiroko Yamashita

Oncology letters 17 ( 2 ) 2177 - 2186 2019年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPANDIDOS PUBL LTD

The value of assessing tumor infiltrating lymphocytes (TILs) in estrogen receptor (ER) positive/human epidermal growth factor receptor type 2 (HER2) negative breast cancer has yet to be determined. In the present study, a total of 184 cases with early distant recurrence detected within 5 years following the primary operation, 134 with late distant recurrence diagnosed following 5 years or longer and 321 controls without recurrence for >10 years following starting the initial treatment for ER-positive/HER2 negative breast cancer, registered in 9 institutions, were analyzed. The distributions of TILs and their clinical relevance were investigated. TIL distributions did not differ significantly among the early, late and no recurrence groups, employing a 30% cut-off point as a dichotomous variable. In those who had received adjuvant chemotherapy as well as endocrine therapy, a trend toward higher TIL proportions was detected when the early recurrence group was compared with the no recurrence group employing the 30% cut-off point (P=0.064). The TIL distributions were significantly associated with nodal metastasis (P=0.004), ER status (P=0.045), progesterone receptor (PgR) status (P=0.002), tumor grade (P=0.021), and the Ki67 labeling index (LI) (P=0.002) in the no recurrence group and with the Ki67 LI in the recurrence groups (P=0.002 in early recurrence group, P=0.023 in late recurrence group). High TIL distributions also predicted shorter survival time following the detection of recurrence (P=0.026). However, these prognostic interactions were not significant in multivariate analysis (P=0.200). The present retrospective study demonstrated no significant interaction between TIL proportions and the timing of recurrence. However, higher TIL proportions were observed in breast cancer patients with aggressive biological phenotypes, which tended to be more responsive to chemotherapy. The clinical relevance of stromal TILs for identifying patients who would likely benefit from additional therapies merits further investigation in a larger patient population.

DOI： 10.3892/ol.2018.9853

A marked goiter involved in Marine-Lenhart syndrome.

Kosuke Oka, Miho Yasuda, Tadahiko Shien, Fumio Otsuka

Journal of general and family medicine 20 ( 1 ) 37 - 38 2019年1月

The efficacy and feasibility of dose-dense sequential chemotherapy for Japanese patients with breast cancer. 査読

Daisuke Takabatake, Yukiko Kajiwara, Shoichiro Ohtani, Yoko Itano, Mari Yamamoto, Shinichiro Kubo, Masahiko Ikeda, Mina Takahashi, Fumikata Hara, Kenjiro Aogi, Shozo Ohsumi, Yutaka Ogasawara, Yoshitaka Nishiyama, Hajime Hikino, Kinya Matsuoka, Yuko Takahashi, Tadahiko Shien, Naruto Taira, Hiroyoshi Doihara

Breast cancer (Tokyo, Japan) 25 ( 6 ) 717 - 722 2018年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer Tokyo

BACKGROUND: Perioperative dose-dense chemotherapy (DDCT) with granulocyte-colony stimulating factor (G-CSF) prophylaxis is a standard treatment for patients with high-risk breast cancer. The approval of this approach in Japan led to the widespread adoption of DDCT, despite limited efficacy and safety data among Japanese patients. We evaluated the efficacy and safety of neoadjuvant DDCT for Japanese patients with breast cancer. METHODS: This prospective, multicenter, phase II study evaluated 52 women with operable human epidermal growth factor receptor 2-negative breast cancer and axillary lymph node metastasis. Neoadjuvant DDCT (adriamycin plus cyclophosphamide or epirubicin plus cyclophosphamide followed by paclitaxel) was administrated every 2 weeks with G-CSF support. The study endpoints were the rates of pathological complete response (pCR), febrile neutropenia, treatment completion, toxicities, and the relative dose intensity (RDI). RESULTS: The pCR rate was 21.9% (9/41) and the triple-negative (TN) subtype was significantly associated with a high pCR rate (triple-negative: 53.3% vs. luminal A: 7.7% and luminal B: 0%; p = 0.003). The treatment completion rate was 80.8% (42/52) and the average RDI was 98.9%. Most adverse events were manageable and tolerable. Six patients (11.5%) developed febrile neutropenia. Grade 3-4 adverse events were slightly more common among older patients (57%) with a low protocol completion rate (≥ 65 years: 42.9% vs. <65 years: 86.7%, p = 0.0062). CONCLUSION: The pCR rate for DDCT was similar to that of standard chemotherapy, although it was remarkably effective for the TN subtype. DDCT may be feasible for Japanese patients with breast cancer although caution is needed for older patients.

DOI： 10.1007/s12282-018-0877-1

Journal Watch: our experts look back and highlight some of the key breast cancer research articles from 2018

Elaine M. Walsh, Tadahiko Shien, Cesar A. Santa-Maria

BREAST CANCER MANAGEMENT 7 ( 4 ) 2018年11月

Combined inhibition of MEK and PI3K pathways overcomes acquired resistance to EGFR-TKIs in non-small cell lung cancer. 査読国際誌

Hiroki Sato, Hiromasa Yamamoto, Masakiyo Sakaguchi, Kazuhiko Shien, Shuta Tomida, Tadahiko Shien, Hirokuni Ikeda, Minami Hatono, Hidejiro Torigoe, Kei Namba, Takahiro Yoshioka, Eisuke Kurihara, Yusuke Ogoshi, Yuta Takahashi, Junichi Soh, Shinichi Toyooka

Cancer science 109 ( 10 ) 3183 - 3196 2018年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

Compensatory activation of the signal transduction pathways is one of the major obstacles for the targeted therapy of non-small cell lung cancer (NSCLC). Herein, we present the therapeutic strategy of combined targeted therapy against the MEK and phosphoinositide-3 kinase (PI3K) pathways for acquired resistance to epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) in NSCLC. We investigated the efficacy of combined trametinib plus taselisib therapy using experimentally established EGFR-TKI-resistant NSCLC cell lines. The results showed that the feedback loop between MEK/ERK and PI3K/AKT pathways had developed in several resistant cell lines, which caused the resistance to single-agent treatment with either inhibitor alone. Meanwhile, the combined therapy successfully regulated the compensatory activation of the key intracellular signals and synergistically inhibited the cell growth of those cells in vitro and in vivo. The resistance mechanisms for which the dual kinase inhibitor therapy proved effective included (MET) mesenchymal-epithelial transition factor amplification, induction of epithelial-to-mesenchymal transition (EMT) and EGFR T790M mutation. In further analysis, the combination therapy induced the phosphorylation of p38 MAPK signaling, leading to the activation of apoptosis cascade. Additionally, long-term treatment with the combination therapy induced the conversion from EMT to mesenchymal-to-epithelial transition in the resistant cell line harboring EMT features, restoring the sensitivity to EGFR-TKI. In conclusion, our results indicate that the combined therapy using MEK and PI3K inhibitors is a potent therapeutic strategy for NSCLC with the acquired resistance to EGFR-TKIs.

DOI： 10.1111/cas.13763

Marine-Lenhart症候群の一例

西村碧フィリーズ, 河内麻里子, 枝園忠彦, 鈴木陽子, 梶原友紀子, 鳩野みなみ, 突沖貴宏, 河田健吾, 高橋侑子, 岩本高行, 池田宏国, 平成人, 土井原博義

日本臨床外科学会雑誌 79 ( 増刊 ) 842 - 842 2018年10月

Thyroid follicular carcinoma in a teenager: A case report. 査読

Kosuke Oka, Tadahiko Shien, Fumio Otsuka

Journal of general and family medicine 19 ( 5 ) 170 - 172 2018年9月

Current status of postmastectomy radiation therapy in T1-2 breast cancer with limited positive lymph nodes in Japan: Japan Clinical Oncology Group Survey. 査読

Shinsuke Sasada, Tadahiko Shien, Hiroji Iwata

Breast cancer (Tokyo, Japan) 25 ( 5 ) 626 - 627 2018年9月

Hormonal Therapy Resistant Estrogen-receptor Positive Metastatic Breast Cancer Cohort (HORSE-BC) Study : Current Status of Treatment Selection in Japan. 査読

Takayuki Iwamoto, Naruto Taira, Tomomi Fujisawa, Kazuhiro Araki, Kentaro Sakamaki, Takafumi Sangai, Yuichiro Kikawa, Tadahiko Shien, Shintaro Takao, Masako Sato, Yoshinari Goto, Takashi Yoshida, Masato Takahashi, Tomohiko Aihara, Hirofumi Mukai

Acta medica Okayama 72 ( 4 ) 369 - 374 2018年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

The Hormonal therapy resistant estrogen-receptor positive metastatic breast cancer cohort (HORSE-BC) study is a multicenter observational study evaluating the efficacy and safety of secondary endocrine therapy (ET) for postmenopausal cases of metastatic breast cancer (MBC) with poor response to primary ET. In this initial report we analyze the HORSE-BC baseline data to clarify the current status of treatment selection for MBC in Japan. Baseline data for the 50 patients enrolled in HORSE-BC were analyzed, including patient characteristics, types of secondary ET, and reasons for selecting secondary ET. Postoperative recurrence was detected in 84% of patients (42/50) and de novo stage IV breast cancer in 16% (8/50). Forty-one patients (41/50; 82%) received fulvestrant, 5 patients (10%) received selective estrogen receptor modulators (SERMs), 3 patients (6%) received ET plus a mammalian target of rapamycin (mTOR) inhibitor, and 1 patient received an aromatase inhibitor (AI) as the secondary ET. Forty-five patients selected their secondary ET based on its therapeutic effect, while 14 patients selected it based on side effects. Most patients with progression after primary ET selected fulvestrant as the secondary ET based on its therapeutic and side effects. We await the final results from the HORSE-BC study.

DOI： 10.18926/AMO/56172

Current Multidisciplinary Approach to Fertility Preservation for Breast Cancer Patients. 査読

Yuko Takahashi, Tadahiko Shien, Ai Sakamoto, Yuko Tsuyumu, Ryo Yoshioka, Maya Uno, Minami Hatono, Mariko Kochi, Kengo Kawada, Takahiro Tsukioki, Takayuki Iwamoto, Hirokuni Ikeda, Naruto Taira, Junji Matsuoka, Mikiya Nakatsuka, Hiroyoshi Doihara

Acta medica Okayama 72 ( 2 ) 137 - 142 2018年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Adverse effects on fertility are a significant problem for premenopausal breast cancer patients. Since April 2009, we have been referring young patients for fertility counseling provided by a multidisciplinary team. Here we evaluated the efficacy and safety of our current fertility preservation approach. We retrospectively analyzed the cases of 277 patients < 45 years old at diagnosis, which was made between 2009 and 2016. Seventy-two (26%) patients received fertility counseling. Seventeen (6%) of the 277 patients decided to preserve their fertility before starting adjuvant systemic therapy. Six (35%) patients underwent oocyte cryopreservation, and 11 (65%) married patients opted for embryo cryopreservation. There were no pregnancies among the patients undergoing oocyte cryopreservation, whereas 3 (27%) of the patients who opted for embryo cryopreservation became pregnant. Two (12%) patients stopped endocrine therapy after 2 years in an effort to become pregnant, but their breast cancers recurred. Though the problem of fertility loss for breast cancer patients is important and we should assess the infertility risk for all patients, we should also consider the prognosis. In June 2016, we launched a prospective multicenter cohort study to evaluate the efficacy and safety of fertility preservation in greater detail.

DOI： 10.18926/AMO/55854

Open-label Phase II study of everolimus plus endocrine therapy in postmenopausal women with ER-positive and HER2-negative metastatic breast cancer (Chloe trial)

Tatsunori Shimoi, Akihiko Shimomura, Tadahiko Shien, Yukari Uemura, Hiroaki Kato, Masahiro Kitada, Tatsuya Toyama, Tomohiko Aihara, Hirofumi Mukai

Open Access Journal of Clinical Trials 10 13 - 18 2018年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

? 2018 Shimoi et al. Background: This is a randomized, multicenter, open-label, Phase II study designed to evaluate the efficacy of everolimus added to continuous aromatase inhibitor (AI) administration in patients who had maintained stable disease or a better response for at least 5 months. Patients and methods: Patients will be randomized to everolimus and standard therapy groups (1:1 ratio). In the everolimus group, patients will receive everolimus in addition to the AI agent. The standard therapy group will continue AI alone treatment. The primary endpoint is progression-free survival. Target accrual is 130 patients with a two-sided type I error rate of 10% and 80% power to detect 35% risk reduction. Conclusion: The Chloe trial will provide important information about the efficacy and safety of adding everolimus to AI in patients with estrogen receptor-positive and human epidermal growth factor 2-negative metastatic breast cancer.

DOI： 10.2147/OAJCT.S155706

Serum lipid and bone metabolism effects of Toremifene vs. Letrozole as adjuvant therapy for postmenopausal early breast cancer patients: results of a multicenter open randomized study. 査読国際誌

Tadahiko Shien, Hiroyoshi Doihara, Nobuaki Sato, Keisei Anan, Kansei Komaki, Keisuke Miyauchi, Yasuhiro Yanagita, Tomomi Fujisawa, Shoshu Mitsuyama, Chizuko Kanbayashi, Mikihiro Kusama, Morihiko Kimura, Hiromitsu Jinno, Muneaki Sano, Tadashi Ikeda

Cancer chemotherapy and pharmacology 81 ( 2 ) 269 - 275 2018年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer Verlag

A prospective randomized phase II trial was conducted to evaluate the time course effects of toremifene (TOR) and letrozole (LET), as adjuvant hormone therapy, on serum lipid profiles and bone metabolism in estrogen receptor (ER)-positive, postmenopausal breast cancer patients.Fifty-four postmenopausal breast cancer patients [ER positive, HER2 negative, T1-2, node metastases (n = 0-3), M0] who had undergone curative resection were enrolled. They were randomized to receive either TOR 40 mg/day or LET 2.5 mg/day as adjuvant hormone therapy. Serum lipids and bone markers were measured prior to, and again at 6, 12, and 24 months after initiation of treatment. Changes in serum lipids and bone markers were compared. Serum levels of total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) were decreased compared with the baseline values at 6 months in 6.5 and 14.0% of patients, respectively, receiving TOR. Lipid levels did not change in patients administered LET. Significant differences were observed in TC and LDL-C between the two groups at 12 and 24 months. In the TOR group, serum bone-specific alkaline phosphatase (BAP) was decreased by 25.0% at 12 months, and serum cross-linked N-telopeptide of type-I collagen (NTx) was decreased by 13.6% at 6 months, and these reductions were maintained for at least 24 months. In contrast, in the LET group, serum BAP did not change and NTx was increased by 16.0% at 6 months and by 18.6% at 24 months, as compared with the baseline.TOR and LET exert different effects on serum lipid profiles and bone metabolism markers. The effects of TOR, as adjuvant hormone therapy, on both lipids and bone metabolism in postmenopausal breast cancer patients are superior to those of LET.

DOI： 10.1007/s00280-017-3491-6

Tumour-infiltrating lymphocytes (TILs)-related genomic signature predicts chemotherapy response in breast cancer. 査読国際誌

Mariko Kochi, Takayuki Iwamoto, Naoki Niikura, Giampaolo Bianchini, Shinobu Masuda, Taeko Mizoo, Tomohiro Nogami, Tadahiko Shien, Takayuki Motoki, Naruto Taira, Yutaka Tokuda, Hiroyoshi Doihara, Junji Matsuoka, Toshiyoshi Fujiwara

Breast cancer research and treatment 167 ( 1 ) 39 - 47 2018年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Springer New York LLC

PURPOSE: The present study evaluated whether morphological-measured stromal and intra-tumour tumour-infiltrating lymphocytes (TILs) levels were associated with gene expression profiles, and whether TILs-associated genomic signature (GS) could be used to predict clinical outcomes and response to therapies in several breast cancer subtypes. METHODS: We retrospectively evaluated haematoxylin eosin (HE)-TILs levels and gene expression profiling data from 40 patients with primary breast cancer and extracted the 22 overexpressed genes in cases with high TILs scores as the TILs-GS. The TILs-GS were compared with breast cancer subtype and were evaluated predictive values for prognosis and response to therapies. RESULTS: Higher TILs-GS expressions were observed for triple-negative and human epidermal growth factor receptor 2 (HER2) positive (+) breast cancers, compared to the luminal types (P < 0.001). With the exception of HER2+, the TILs-GS had no prognostic value in subtypes of breast cancers. The Wilcoxon test revealed significantly different TILs-GS levels between the cases with pathological complete response (pCR) and residual disease after anthracycline and taxane-based neoadjuvant chemotherapy, with the exception of the luminal-low proliferation subtype. In the multivariate analysis, pCR was independently associated with smaller tumour size, higher histological grade, ER negativity, HER2 positivity and higher TILs-GS scores (OR 2.02, 95% CI 1.30-3.14, P = 0.025). CONCLUSIONS: TILs-GS was associated with stromal and intra-tumour TILs levels, as evaluated using HE, which predicted prognosis and chemotherapy response in several breast cancer subtypes. Further studies are needed to perform stratification according to TILs-GS levels and the conventional breast cancer subtypes.

DOI： 10.1007/s10549-017-4502-3

Durable complete response in HER2-positive breast cancer: a multicenter retrospective analysis. 国際誌

Naoki Niikura, Akihiko Shimomura, Yumi Fukatsu, Masataka Sawaki, Rin Ogiya, Hiroyuki Yasojima, Tomomi Fujisawa, Mitsugu Yamamoto, Michiko Tsuneizumi, Akira Kitani, Junichiro Watanabe, Akira Matsui, Yuko Takahashi, Seiki Takashima, Tadatoshi Shien, Kenji Tamura, Shigehira Saji, Norikazu Masuda, Yutaka Tokuda, Hhiroji Iwata

Breast cancer research and treatment 167 ( 1 ) 81 - 87 2018年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Though advanced and metastatic epidermal growth factor receptor 2 (HER2)-positive disease is not curable, a small proportion of patients with HER2-positive metastatic breast cancer remain in prolonged complete remission with anti-HER2 treatment. We hypothesized that some cases of HER2-positive metastatic breast cancer may be curable. In this large, multicenter retrospective study, we aimed to assess the long-term outcomes for patients with a durable response to trastuzumab. METHODS: We retrospectively evaluated the data of patients diagnosed with HER2-positive metastatic breast cancer who received trastuzumab for more than 2 years as the first-line treatment. Patients diagnosed between April 1, 2001 and December 31, 2014 at 19 institutions in Japan were included in the analysis. From 124 potential subjects, 16 were excluded and 108 were evaluated. RESULTS: The median follow-up length was 7.7 years. Disease progression occurred in 44/108 (40.7%) patients and 13/108 (12%) patients died. The median progression-free survival was 11.2 years, and as more than 80% of patients were alive 10 years after metastatic breast cancer diagnosis. Of the 108 patients, 57 achieved a clinical complete response. Trastuzumab therapy was interrupted for 27 (47.4%) of these patients (based on the doctor's recommendation for 19 patients, owing to adverse events for 4 patients, owing to unknown reasons for 3 patients, and at the request of 1 patient). Disease progression occurred in 4 of the 27 patients after the interruption of trastuzumab treatment. The median duration of trastuzumab therapy for all 27 patients was 5.1 years (0.9-9.3 years). CONCLUSION: We found that some patients showed no evidence of disease after the interruption of trastuzumab therapy. Discontinuation of maintenance trastuzumab in this patient population after a limited time should be explored cautiously while awaiting a global collaborative effort for a randomized trial.

DOI： 10.1007/s10549-017-4489-9

The eligibility of primary tumor resection for de novo stage IV breast cancer patients 査読

Tadahiko Shien

Translational Cancer Research 7 S604 - S607 2018年

The sexual lives of breast cancer patients: Coping with changes associated with treatment

Ayumi Yoshikawa, Shinya Saito, Makiko Kondo, Yuko Tsuyumu, Naruto Taira, Tadahiko Shien, Hiroyoshi Doihara

Clinical Nursing Studies 6 ( 1 ) 61 - 61 2017年11月

掲載種別：研究論文（学術雑誌）出版者・発行元：Sciedu Press

Objective: To clarify how breast cancer patients undergoing post-surgical hormone therapy cope with changes in their sexual lives and support themselves and their partners during these changes.Methods: Participants were 37 breast cancer patients undergoing post-surgical hormone therapy and attending mammary outpatient clinics. In-depth interviews and grounded theory were used to collect and analyze data, respectively.Results: First, sexual life was divided into four groups: “No complaint” regarding sexual activity, “Slight discord”, “Handicapped in meeting a life partner” and “Uninterested” in sexual activity. Sexual life during surgical-hormone therapy did not change significantly from sexual life before breast cancer. Second, meanings of sexual activity for breast cancer patients were divided into five, “Regaining femininity”, “Confirming love”, “Sharing pleasure”, “Response to partner’s higher desire” and “Procreation”. They differed by group. Third, coping strategies were divided into six, “Virtuous cycle to confirm love and regain lost femininity”, “Struggle to avoid relationship crisis”, “Reconfirmation of partner’s affection by his abstinence”, “Attempt to recover the sexual activity they hope for”, “Pursuing children or assuaging partner’s desire by other means” and “Difficulty making a partner continue to have sexual activity”.Conclusions: Nurses should screen breast cancer patients for changes in their sexual lives and to ascertain what sexual activity means to patients, and support them in selecting appropriate coping methods.

DOI： 10.5430/cns.v6n1p61

内分泌療法耐性転移乳癌に対する二次内分泌療法のコホート研究治療選択の現状査読

三階貴史, 藤澤知巳, 平成人, 荒木和浩, 岩本高行, 木川雄一郎, 枝園忠彦, 高尾信太郎, 佐藤雅子, 後藤與四成, 吉田崇, 高橋將人, 相原智彦, 坂巻顕太郎, 向井博文

日本癌治療学会学術集会抄録集 55回 O18 - 2 2017年10月

Erratum to: Post-relapse survival in patients with the early and late distant recurrence in estrogen receptor-positive HER2-negative breast cancer. 査読

Akiko Ogiya, Kieko Yamazaki, Rie Horii, Tadahiko Shien, Yoshiya Horimoto, Norikazu Masuda, Touko Inao, Mitsuchika Hosoda, Naoko Ishida, Tomofumi Osako, Masato Takahashi, Yumi Endo, Yuichiro Miyoshi, Hiroyuki Yasojima, Nobumoto Tomioka, Hiroko Yamashita

Breast cancer (Tokyo, Japan) 24 ( 4 ) 642 - 642 2017年7月

Metformin improves immune function of exhausted peripheral CD8(+) T cells derived from cancer patients

Mototsugu Watanabe, Shingo Eikawa, Kazuhiko Shien, Hiromasa Yamamoto, Tadahiko Shien, Junichi Soh, Hiroyoshi Doihara, Shinichi Toyooka, Shinichiro Miyoshi, Heiichiro Udono

CANCER RESEARCH 77 2017年7月

Significance of primary lesion resection in Stage IV breast cancer. 査読国際誌

Tadahiko Shien, Hiroji Iwata

Japanese journal of clinical oncology 47 ( 5 ) 381 - 384 2017年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

Systemic treatment with drugs is administered to prolong survival and palliate symptoms in Stage IV breast cancer patients who have distant metastases at diagnosis. Surgical procedures for the primary tumor are not actively recommended in guidelines due to lack of evidence indicating prognostic benefit. Recently, several retrospective studies have shown primary tumor resection to prolong overall survival in patients with Stage IV breast cancer. Prospective randomized trials began enrolling patients to examine this possibility and two have already reported results. However, the results of these two trials were discordant. The first trial, conducted in India, reported negative effects of primary tumor resection after primary systemic therapy. A Turkish trial then obtained a positive effect of surgery as primary treatment. Several questions regarding the effects, timing, methods and eligibility for primary surgery have yet to be answered. Robust evidence, which is anticipated from other ongoing trials examining surgery for metastatic breast cancer, is eagerly awaited.

DOI： 10.1093/jjco/hyx027

Post-relapse survival in patients with the early and late distant recurrence in estrogen receptor-positive HER2-negative breast cancer. 査読

Akiko Ogiya, Kieko Yamazaki, Rie Horii, Tadahiko Shien, Yoshiya Horimoto, Norikazu Masuda, Touko Inao, Mitsuchika Hosoda, Naoko Ishida, Tomofumi Osako, Masato Takahashi, Yumi Endo, Yuichiro Miyoshi, Hiroyuki Yasojima, Nobumoto Tomioka, Hiroko Yamashita

Breast cancer (Tokyo, Japan) 24 ( 3 ) 473 - 482 2017年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Few studies have been performed on post-relapse survival in patients with the early and late distant recurrence in estrogen receptor (ER)-positive, HER2-negative breast cancer. METHODS: A total of 205 patients with the early distant recurrence and 134 patients with the late distant recurrence of ER-positive, HER2-negative breast cancer who had undergone breast surgery or neoadjuvant chemotherapy between January 2000 and December 2004 were registered from nine institutions. Prognostic factors for post-relapse survival in patients with the early and late recurrence were analyzed. RESULTS: Post-relapse survival was significantly longer in patients with the late recurrence than in patients with the early recurrence. Predictive factors for post-relapse survival in patients with the early recurrence were lack of adjuvant chemotherapy, a long disease-free interval, and long durations of endocrine therapies and chemotherapies after relapse. In patients with the late recurrence, post-relapse survival was significantly improved for those individuals with one metastatic organ at relapse and individuals who were treated with the first-line and subsequent endocrine therapies for prolonged periods. Moreover, ER expression in primary breast tumors of late recurrence patients was significantly higher with a duration of the first-line endocrine therapy >6 months than in those with a duration ≤6 months. CONCLUSION: Predictors for prognosis after relapse differed between patients with the early and late distant recurrence. Endocrine responsiveness after relapse is a key factor for improved post-relapse survival, and it is thus important to establish whether metastatic tumors are endocrine-resistant in ER-positive, HER2-negative recurrent breast cancer.

DOI： 10.1007/s12282-016-0730-3

Trends in axillary treatment for breast cancer patients undergoing sentinel lymph node biopsy as determined by a questionnaire from the Japanese Breast Cancer Society. 査読

Shigeru Imoto, Chikako Yamauchi, Yoshifumi Komoike, Koichiro Tsugawa, Daisuke Yotsumoto, Noriaki Wada, Takayuki Ueno, Mari S Oba, Tadahiko Shien, Sadatoshi Sugae, Hitoshi Tsuda, Kimiyasu Yoneyama

Breast cancer (Tokyo, Japan) 24 ( 3 ) 427 - 432 2017年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Sentinel lymph node biopsy (SLNB) alone has been compared with SLNB followed by axillary lymph node dissection (ALND) in sentinel lymph node (SLN)-positive breast cancer patients in randomized phase III trials: the addition of ALND did not further improve the patient's outcome. However, there is still some controversy, regarding the clinical application of SLNB alone. To identify the optimal axillary treatment in the era of SLNB, the Japanese Breast Cancer Society conducted a group study of SLNB in 2014. METHODS: A questionnaire on axillary surgery and radiation therapy was sent to 432 Japanese institutes in December 2014, and 309 (72 %) completed the questionnaire. RESULTS: SLNB was performed at 98 % of the institutes, and 77 % offered irradiation for cancer treatment. Regarding breast-conserving surgery (BCS), SLNB alone was indicated at 41 % of the institutes in the cases of SLN with micrometastases. However, in the cases of SLN with macrometastases, ALND was performed at 64 %. The proportion of ALND seemed to be higher in total mastectomy than in BCS regardless of the SLN-positive status. In the cases of SLN with micrometastases, the radiation field was localized in the conserved breast at about half of the institutes. On the other hand, in the cases of SLN with macrometastases, it was extended to axillary and/or supraclavicular lesions beyond the conserved breast at about 70 % of the institutes. CONCLUSIONS: Japanese breast physicians were conservative with respect to the omission of ALND in SLN-positive breast cancer, especially in the cases of SLN with macrometastases.

DOI： 10.1007/s12282-016-0721-4

Immunohistochemical Ki67 after short-term hormone therapy identifies low-risk breast cancers as reliably as genomic markers. 査読国際誌

Takayuki Iwamoto, Toyomasa Katagiri, Naoki Niikura, Yuichiro Miyoshi, Mariko Kochi, Tomohiro Nogami, Tadahiko Shien, Takayuki Motoki, Naruto Taira, Masako Omori, Yutaka Tokuda, Toshiyoshi Fujiwara, Hiroyoshi Doihara, Balazs Gyorffy, Junji Matsuoka

Oncotarget 8 ( 16 ) 26122 - 26128 2017年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IMPACT JOURNALS LLC

BACKGROUND: The purpose of this study was to test whether immunohistochemical (IHC) Ki67 levels after short-term preoperative hormone therapy (post-Ki67) predict similar numbers of patients with favorable prognoses as genomic markers. RESULTS: Thirty paired cases (60 samples) were enrolled in this study. Post-Ki67 levels were significantly lower than pre-treatment Ki67 levels (P < 0.001). Post-Ki67 predicted more low-risk cases (83.3%, 25/30) than pre-genomic surrogate signature(GSS) (66.7%: 20/30), but the difference in predictive power was not significant (P = 0.233). Proliferation (MKI67, STK15, Survivin, CCNB1, and MYBL2) and estrogen (ER, PGR, BCL2, and SCUBE2) related signatures were significantly downregulated after therapy (P < 0.001 and 0.041, respectively). MATERIALS AND METHODS: Core needle biopsy specimens of primary breast cancer were collected at Okayama University Hospital from hormone receptor-positive and human epidermal growth factor 2-negative patients that subsequently received two weeks of neoadjuvant hormone therapy. Paired post-treatment specimens from surgical samples were also collected. IHC Ki67 levels and GSS were compared between pre- and post-hormone treatment samples. Changes of gene expression pattern in short-term hormone therapy were also assessed. CONCLUSIONS: IHC based post-Ki67 levels may have distinct predictive power compared with the naïve IHC Ki67. Future studies with larger cohorts and longer follow-up periods may be needed to validate our results.

DOI： 10.18632/oncotarget.15385

N-acetyltransferase 2 polymorphism and breast cancer risk with smoking: a case control study in Japanese women. 査読

Akio Hara, Naruto Taira, Taeko Mizoo, Keiko Nishiyama, Tomohiro Nogami, Takayuki Iwamoto, Takayuki Motoki, Tadahiko Shien, Junji Matsuoka, Hiroyoshi Doihara, Setsuko Ishihara, Hiroshi Kawai, Kensuke Kawasaki, Youichi Ishibe, Yutaka Ogasawara, Shinichiro Miyoshi

Breast cancer (Tokyo, Japan) 24 ( 2 ) 254 - 262 2017年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Recent studies have suggested that the association between smoking and breast cancer risk might be modified by polymorphisms in the N-acetyltransferase 2 gene (NAT2). Most of these studies were conducted in Western countries, with few reports from East Asia. METHODS: We conducted a case-control study of 511 breast cancer cases and 527 unmatched healthy controls from December 2010 to November 2011 in Japan. Unconditional logistic regression was used to analyze the association of smoking with breast cancer risk stratified by NAT2 phenotype. RESULTS: In this population, 11 % of the cases and 10 % of the controls were classified as a slow acetylator phenotype. Compared to never smokers, current smokers had an increased breast cancer risk in multivariate analysis [odds ratio (OR) = 2.27, 95 % confidence interval (95 %CI) = 1.38-3.82]. Subgroup analyses of menopausal status indicated the same tendency. Subgroup analyses of NAT2 phenotype, the ORs in both of rapid and slow acetylator phenotype subgroups were comparable, and no interactions were observed between smoking status and NAT2 phenotype (p = 0.97). A dose-dependent effect of smoking on breast cancer risk was seen for the rapid acetylator phenotype, but not for the slow acetylator phenotype. CONCLUSION: Given the high frequency of the rapid acetylator phenotype, these results show that smoking is a risk factor for breast cancer among most Japanese women. It may be of little significance to identify the NAT2 phenotype in the Japanese population.

DOI： 10.1007/s12282-016-0696-1

Evaluation of ALDH1 expression in ipsilateral breast cancer recurrence. 査読国際誌

Tadahiko Shien, Takehiro Tanaka, Masahiko Tanabe, Yasuhiro Okumura, Norikazu Masuda, Atsushi Yoshida, Nobuyuki Arima, Yoshifumi Komoike, Satoru Tanaka, Takuji Iwase, Tetsuya Taguchi, Katsuhiko Nakatsukasa, Hideo Inaji, Makoto Ishitobi

Oncology letters 13 ( 3 ) 1071 - 1077 2017年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

Aldehyde dehydrogenase 1 (ALDH1) is a cancer stem cell (CSC) marker that is easily evaluable. The expression and clinical significance of ALDH1 in ipsilateral breast tumor recurrence (IBTR) has yet to be investigated. In the present study, the expression profile of ALDH1 and its correlation with prognosis in IBTR tissues was examined. Patients with IBTR from eight institutions were retrospectively enrolled in the study. Immunohistochemistry was used to examine ALDH1 expression patterns in the tissue specimens of primary cancers and IBTRs. ALDH1 expression levels were investigated in 182 IBTR tumors, which included cases of invasive carcinoma selected from 271 consecutive patients with IBTR. ALDH1 was expressed in 23% of the IBTR tissue samples. The rate of concordant expression between primary cancer and IBTR tissues was 68%. There was no significant association between disease-free survival (DFS) and ALDH1 expression levels in IBTR. IBTRs that expressed ALDH1 and Ki-67 had a poorer prognosis and this expression pattern was significantly associated with DFS (P=0.0073). The percentages of ALDH1 positive expression in each tissue subtype were as follows: Luminal A, 20%; luminal B, 24%; human epidermal growth factor 2 (HER2), 35%; triple-negative, 21%. There was a significant correlation between DFS and ALDH1 expression levels in HER2-type IBTR tissue specimens (P=0.034). In conclusion, it is possible that ALDH1 and Ki-67 expression levels may be useful for predicting prognosis in patients with HER2-type tumors.

DOI： 10.3892/ol.2016.5538

Development of a Japanese version of the BREAST-Q and the traditional psychometric test of the mastectomy module for the assessment of HRQOL and patient satisfaction following breast surgery. 査読

Miho Saiga, Naruto Taira, Yoshihiro Kimata, Satoko Watanabe, Yuko Mukai, Kojiro Shimozuma, Taeko Mizoo, Tomohiro Nogami, Takayuki Iwamoto, Takayuki Motoki, Tadahiko Shien, Junji Matsuoka, Hiroyoshi Doihara

Breast cancer (Tokyo, Japan) 24 ( 2 ) 288 - 298 2017年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: An understanding of health-related quality of life (HRQOL) is of utmost importance in both oncological and esthetic breast surgery. The BREAST-Q is a patient-reported outcome (PRO) measure that investigates HRQOL and patient satisfaction before and after breast surgery. The aim of this study was to develop a Japanese version of the BREAST-Q including the mastectomy module, the reconstruction module, the augmentation module and the reduction/mastopexy module, and to assess the psychometric properties of the mastectomy module among Japanese women. METHODS: The Japanese version of the BREAST-Q was developed through forward translation, backward translation and patient testing. Traditional psychometric testing of the mastectomy module was administered to 45 post-mastectomy patients. RESULTS: The mastectomy, reconstruction, augmentation and reduction/mastopexy modules were formally developed into Japanese. Despite cultural difference between Japanese women and original target population, the contents were considered to be valid among Japanese woman. With the exception of the sexual well-being subscale, good reliability and validity were evident for the mastectomy module (Test-retest reliability 0.76-0.95, Chronbach's alpha coefficient 0.77-0.98). CONCLUSIONS: The BREAST-Q Japanese version is a useful PRO measure for investigating the impact of breast surgery on HRQOL and patient satisfaction. Further validation in younger Japanese women is needed to determine the usefulness of the sexual well-being subscale.

DOI： 10.1007/s12282-016-0703-6

Clinicopathological factors predicting early and late distant recurrence in estrogen receptor-positive, HER2-negative breast cancer. 査読

Hiroko Yamashita, Akiko Ogiya, Tadahiko Shien, Yoshiya Horimoto, Norikazu Masuda, Touko Inao, Tomofumi Osako, Masato Takahashi, Yumi Endo, Mitsuchika Hosoda, Naoko Ishida, Rie Horii, Kieko Yamazaki, Yuichiro Miyoshi, Hiroyuki Yasojima, Nobumoto Tomioka

Breast cancer (Tokyo, Japan) 23 ( 6 ) 830 - 843 2016年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Most studies analyzing prognostic factors for late relapse have been performed in postmenopausal women who received tamoxifen or aromatase inhibitors as adjuvant endocrine therapy for estrogen receptor (ER)-positive breast cancer. METHODS: A total of 223 patients (108 premenopausal and 115 postmenopausal) with early distant recurrence and 149 patients (62 premenopausal and 87 postmenopausal) with late distant recurrence of ER-positive, HER2-negative breast cancer who were given their initial treatment between 2000 and 2004 were registered from nine institutions. For each late recurrence patient, approximately two matched control patients without relapse for more than 10 years were selected. Clinicopathological factors and adjuvant therapies were compared among the three groups by menopausal status and age. RESULTS: Factors predicting early recurrence in premenopausal women were large tumor size, high lymph node category and high tumor grade, whereas predictors for late recurrence were large tumor size and high lymph node category. In postmenopausal women under 60 years of age, factors predicting early recurrence were bilateral breast cancer, large tumor size, high lymph node category, low PgR expression and high Ki67 labeling index (LI), while predictors for late recurrence were large tumor size and high lymph node category. On the other hand, in postmenopausal women aged 60 years or older, factors predicting early recurrence were bilateral breast cancer, large tumor size, high lymph node category, high tumor grade, low ER expression and high Ki67 LI, whereas predictors for late recurrence were high lymph node category, low ER expression and short duration of adjuvant endocrine therapy. CONCLUSION: Predictors of early and late distant recurrence might differ according to menopausal status and age.

DOI： 10.1007/s12282-015-0649-0

A Phase I Trial of 100 mg/m2 Docetaxel in Patients with Advanced or Recurrent Breast Cancer. 査読

Tomoki Tamura, Taizo Hirata, Masahiro Tabata, Shiro Hinotsu, Akinobu Hamada, Takayuki Motoki, Takayuki Iwamoto, Taeko Mizoo, Tomohiro Nogami, Tadahiko Shien, Naruto Taira, Junji Matsuoka, Hiroyoshi Doihara

Acta medica Okayama 70 ( 5 ) 425 - 427 2016年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

Docetaxel is a standard treatment for patients with advanced or recurrent breast cancer. The recommended dose is 60 to 100 mg/m2. Previous study have shown that the tumor response rates of patients who received docetaxel monotherapy at doses of 60, 75, and 100 mg/m2 were 22.1% , 23.3% , and 36.0% , respectively, and there was a significant relationship between the dose and response. In Europe and the United States, docetaxel is approved at a dose of 100 mg/m2, and Japanese guidelines also recommend a dose of 100 mg/m2. However, the approved dose in Japan is up to 75 mg/m2. We have launched a phase I trial evaluating 100 mg/m2 docetaxel in patients with advanced or relapsed breast cancer. The major eligibility criteria are as follows: age 20 years, pathologically diagnosed breast cancer, recurrent or advanced breast cancer, a good performance status, and HER2 [human epidermal growth factor receptor 2] negative. The primary endpoint is demonstrated safety of 100 mg/m2 docetaxel. This study will clarify whether 100mg/m2 docetaxel can be administrated safely in Japanese patients with advanced or recurrent breast cancer.

DOI： 10.18926/AMO/54607

A phase 1, dose-finding and pharmacokinetic study of gemcitabine with nab-paclitaxel in patients with metastatic breast cancer. 査読国際誌

Seiji Yoshitomi, Naruto Taira, Hiroyoshi Doihara, Taeko Mizoo, Tomohiro Nogami, Takayuki Iwamoto, Takayuki Motoki, Tadahiko Shien, Yutaka Ogasawara, Junji Matsuoka, Hisashi Tsuji, Toshiharu Mitsuhashi

Cancer chemotherapy and pharmacology 78 ( 2 ) 289 - 94 2016年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

PURPOSE: Gemcitabine (Gem) with paclitaxel (Pac) is used for patients with metastatic breast cancer who require cytoreduction with manageable toxicities. Nanoparticle albumin-bound (nab)-Pac exhibits better efficacy and reduces the risk of hypersensitivity reactions associated with solvent-based Pac. Therefore, Gem plus nab-Pac (GA) therapy may be effective for metastatic breast cancer. The purpose of this study was to determine the maximum tolerated dose for GA therapy. METHODS: The subjects were patients with metastatic breast cancer with performance status 0 or 1 and normal hepatic, renal and marrow function. Leukopenia, neutropenia or thrombocytopenia of grade 4, neutropenic fever, or non-hematological toxicity of grade 3 or higher during the 1st cycle, and chemotherapy-induced peripheral neurotoxicity of grade 2 or higher at the end of the 1st cycle were defined as dose-limiting toxicities (DLTs). Gem (1250 mg/m(2)) was administered on days 1 and 8. nab-Pac was administered at a starting dose of 180 mg/m(2) (cohort 1) and escalated to 220 mg/m(2) (cohort 2) and 260 mg/m(2) (cohort 3) on day 1 of the 21-day cycle, using a 3 + 3 design. RESULTS: Nine patients (n = 3, 3, and 3 in cohorts 1, 2, and 3, respectively) were included in the study (median age 56 years; range 43-75 years). DLTs did not occur in any cohorts. CONCLUSIONS: The initial recommend dose in GA therapy is 1250 mg/m(2) Gem and 260 mg/m(2) nab-Pac. It is well known that nab-Pac has cumulative toxicities, and thus the efficacy and safety of GA therapy require validation in a phase 2 study.

DOI： 10.1007/s00280-016-3091-x

Study about the Efficacy of Metformin to Immune Function in Cancer Patients. 査読

Mototsugu Watanabe, Hiromasa Yamamoto, Shingo Eikawa, Kazuhiko Shien, Tadahiko Shien, Junichi Soh, Katsuyuki Hotta, Jun Wada, Shiro Hinotsu, Toshiyoshi Fujiwara, Katsuyuki Kiura, Hiroyoshi Doihara, Shinichiro Miyoshi, Heiichiro Udono, Shinichi Toyooka

Acta medica Okayama 70 ( 4 ) 327 - 30 2016年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

A study to evaluate the effect of metformin on the immune system was commenced in July 2014. Metformin is one of the most commonly prescribed drugs for type 2 diabetes, and previous studies have reported that metformin has an anti-tumor effect. The aim of this study is to evaluate the efficacy of metformin on the immune system in human cancer patients in vivo. The primary outcome parameter will be the rate change in the population of CD8＋ T cells, which produce multiple cytokines.

DOI： 10.18926/AMO/54514

Differences in expression of the cancer stem cell marker aldehyde dehydrogenase 1 among estrogen receptor-positive/human epidermal growth factor receptor type 2-negative breast cancer cases with early, late, and no recurrence. 査読国際誌

Yuichiro Miyoshi, Tadahiko Shien, Akiko Ogiya, Naoko Ishida, Kieko Yamazaki, Rie Horii, Yoshiya Horimoto, Norikazu Masuda, Hiroyuki Yasojima, Touko Inao, Tomofumi Osako, Masato Takahashi, Nobumoto Tomioka, Yumi Endo, Mitsuchika Hosoda, Hiroyoshi Doihara, Shinichiro Miyoshi, Hiroko Yamashita

Breast cancer research : BCR 18 ( 1 ) 73 - 73 2016年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BioMed Central Ltd.

BACKGROUND: The significance of the expression of aldehyde dehydrogenase 1 (ALDH1), a cancer stem cell marker, for predicting the recurrence of estrogen receptor (ER)-positive/human epidermal growth factor receptor type 2 (HER2)-negative breast cancer is still poorly understood. The value of ALDH1 in predicting the time of recurrence remains unknown. METHODS: In total, 184 patients with early distant recurrence, 134 patients with late distant recurrence, and 321 control patients without recurrence for more than 10 years after starting initial treatment for ER-positive/HER2-negative breast cancer, registered in 9 institutions, were analyzed. We assessed relationships between ALDH1 and other clinicopathological features, and ALDH1 expression was compared among the three groups. The relationship between ALDH1 expression and overall survival after recurrence was also evaluated in each group. RESULTS: The rates of ALDH1 expression positivity (more than 1 %) in the early, late, and no recurrence groups were 18.4 %, 13.4 %, and 8.4 %, respectively. ALDH1 expression correlated significantly with lymph node metastases (p = 0.048) and the Ki-67 labeling index (p < 0.001) in the early recurrence group. Multivariate analysis revealed ALDH1 expression to be significantly higher in the early recurrence group than in the no recurrence group (adjusted OR 2.140, 95 % CI 1.144-4.003, p = 0.016). Moreover, there was a significant difference in ALDH1 expression between the early and no recurrence groups receiving adjuvant endocrine therapy and chemotherapy (adjusted OR 4.625, 95 % CI 1.881-12.474, p < 0.001). However, there was no difference in ALDH1 expression between the late and no recurrence groups in univariate analysis (OR 1.507, 95 % CI 0.738-2.998, p = 0.253). In multivariate analysis, ALDH1 was not a factor independently predicting overall survival after the detection of recurrence (adjusted OR 1.451, 95 % CI 0.985-2.085, p = 0.059). CONCLUSIONS: Among patients with ER-positive/HER2-negative breast cancer, ALDH1 expression was more common in those with early recurrence, and this expression was found to be associated with a more aggressive breast cancer phenotype than that in the patients without recurrence. Further study is needed to clarify the prognostic significance of the heterogeneity of cancer stem cells and to confirm their role in resistance to chemotherapy.

DOI： 10.1186/s13058-016-0731-3

Differences in expression of the cancer stem cell marker aldehyde dehydrogenase 1 among estrogen receptor-positive/human epidermal growth factor receptor type 2-negative breast cancer cases with early, late, and no recurrence 査読

Yuichiro Miyoshi, Tadahiko Shien, Akiko Ogiya, Naoko Ishida, Kieko Yamazaki, Rie Horii, Yoshiya Horimoto, Norikazu Masuda, Hiroyuki Yasojima, Touko Inao, Tomofumi Osako, Masato Takahashi, Nobumoto Tomioka, Yumi Endo, Mitsuchika Hosoda, Hiroyoshi Doihara, Shinichiro Miyoshi, Hiroko Yamashita

BREAST CANCER RESEARCH 18 2016年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BIOMED CENTRAL LTD

Background: The significance of the expression of aldehyde dehydrogenase 1 (ALDH1), a cancer stem cell marker, for predicting the recurrence of estrogen receptor (ER)-positive/human epidermal growth factor receptor type 2 (HER2)-negative breast cancer is still poorly understood. The value of ALDH1 in predicting the time of recurrence remains unknown.
Methods: In total, 184 patients with early distant recurrence, 134 patients with late distant recurrence, and 321 control patients without recurrence for more than 10 years after starting initial treatment for ER-positive/HER2-negative breast cancer, registered in 9 institutions, were analyzed. We assessed relationships between ALDH1 and other clinicopathological features, and ALDH1 expression was compared among the three groups. The relationship between ALDH1 expression and overall survival after recurrence was also evaluated in each group.
Results: The rates of ALDH1 expression positivity (more than 1 %) in the early, late, and no recurrence groups were 18. 4 %, 13.4 %, and 8.4 %, respectively. ALDH1 expression correlated significantly with lymph node metastases (p = 0.048) and the Ki-67 labeling index (p < 0.001) in the early recurrence group. Multivariate analysis revealed ALDH1 expression to be significantly higher in the early recurrence group than in the no recurrence group (adjusted OR 2.140, 95 % CI 1.144-4.003, p = 0.016). Moreover, there was a significant difference in ALDH1 expression between the early and no recurrence groups receiving adjuvant endocrine therapy and chemotherapy (adjusted OR 4.625, 95 % CI 1.881-12.474, p < 0.001). However, there was no difference in ALDH1 expression between the late and no recurrence groups in univariate analysis (OR 1.507, 95 % CI 0.738-2.998, p = 0.253). In multivariate analysis, ALDH1 was not a factor independently predicting overall survival after the detection of recurrence (adjusted OR 1.451, 95 % CI 0.985-2.085, p = 0.059).
Conclusions: Among patients with ER-positive/HER2-negative breast cancer, ALDH1 expression was more common in those with early recurrence, and this expression was found to be associated with a more aggressive breast cancer phenotype than that in the patients without recurrence. Further study is needed to clarify the prognostic significance of the heterogeneity of cancer stem cells and to confirm their role in resistance to chemotherapy.

DOI： 10.1186/s13058-016-0731-3

Local recurrence risk after previous salvage mastectomy. 査読国際誌

M Tanabe, T Iwase, Y Okumura, A Yoshida, N Masuda, K Nakatsukasa, T Shien, S Tanaka, Y Komoike, T Taguchi, N Arima, R Nishimura, H Inaji, M Ishitobi

European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 42 ( 7 ) 980 - 5 2016年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: Breast-conserving surgery is a standard treatment for early breast cancer. For ipsilateral breast tumor recurrence (IBTR) after breast-conserving surgery, salvage mastectomy is the current standard surgical procedure. However, it is not rare for patients with IBTR who have received salvage mastectomy to develop local recurrence. In this study, we examined the risk factors of local recurrence after salvage mastectomy for IBTR. PATIENTS AND METHODS: A total of 118 consecutive patients who had histologically confirmed IBTR without distant metastases and underwent salvage mastectomy without irradiation for IBTR between 1989 and 2008 were included from eight institutions in Japan. The risk factors of local recurrence were assessed. RESULTS: The median follow-up period from salvage mastectomy for IBTR was 4.6 years. Patients with pN2 or higher on diagnosis of the primary tumor showed significantly poorer local recurrence-free survival than those with pN0 or pN1 at primary tumor (p < 0.001). Multivariate analysis showed that the lymph node status of the primary tumor was a significantly independent predictive factor of local recurrence-free survival (p = 0.02). CONCLUSION: The lymph node status of the primary tumor might be a predictive factor of local recurrence-free survival after salvage mastectomy for IBTR. Further research and validation studies are needed. (UMIN-CTR number UMIN000008136).

DOI： 10.1016/j.ejso.2016.03.008

その他リンク： http://orcid.org/0000-0001-5536-132X

Evaluation of aldehyde dehydrogenase 1 and transcription factors in both primary breast cancer and axillary lymph node metastases as a prognostic factor. 査読

Maiko Ito, Tadahiko Shien, Masako Omori, Taeko Mizoo, Takayuki Iwamoto, Tomohiro Nogami, Takayuki Motoki, Naruto Taira, Hiroyoshi Doihara, Shinichiro Miyoshi

Breast cancer (Tokyo, Japan) 23 ( 3 ) 437 - 44 2016年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

BACKGROUND: Aldehyde dehydrogenase 1 (ALDH1) is a marker of breast cancer stem cells, and the expression of ALDH1 may be a prognostic factor of poor clinical outcome. The epithelial-mesenchymal transition may produce cells with stem-cell-like properties promoted by transcription factors. We investigated the expression of ALDH1 and transcription factors in both primary and metastatic lesions, and prognostic value of them in breast cancer patients with axillary lymph node metastasis (ALNM). METHOD: Forty-seven breast cancer patients with ALNM who underwent surgery at Okayama University Hospital from 2002 to 2008 were enrolled. We retrospectively evaluated the levels of ALDH1 and transcription factors, such as Snail, Slug and Twist, in both primary and metastatic lesions by immunohistochemistry. RESULTS: In primary lesions, the positive rate of ALDH1, Snail, Slug and Twist was 19, 49, 40 and 26%, respectively. In lymph nodes, that of ALDH1, Snail, Slug and Twist was 21, 32, 13 and 23%, respectively. The expression of ALDH1 or transcription factors alone was not significantly associated with a poor prognosis. However, co-expression of ALDH1 and Slug in primary lesions was associated with a shorter DFS (P = 0.009). CONCLUSIONS: The evaluation of the co-expression of ALDH1 and transcription factors in primary lesions may be useful in prognosis of node-positive breast cancers.

DOI： 10.1007/s12282-015-0583-1

Relative Prognostic and Predictive Value of Gene Signature and Histologic Grade in Estrogen Receptor-Positive, HER2-Negative Breast Cancer. 査読国際誌

Takayuki Iwamoto, Catherine Kelly, Taeko Mizoo, Tomohiro Nogami, Takayuki Motoki, Tadahiko Shien, Naruto Taira, Naoki Hayashi, Naoki Niikura, Toshiyoshi Fujiwara, Hiroyoshi Doihara, Junji Matsuoka

Clinical breast cancer 16 ( 2 ) 95 - 100 2016年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CIG MEDIA GROUP, LP

BACKGROUND: In estrogen receptor (ER)-positive, human epidermal growth factor receptor 2 (HER2)-negative breast cancer, first-generation genomic signatures serve predominately as prognostic biomarkers and secondarily as predictors of response to chemotherapy. We compared both the prognostic and predictive value of histologic grades and genomic markers. METHODS: We retrieved publicly available cDNA microarray data from 1373 primary ER(+)/HER2(-) breast cancers and developed a genomic signature simulated from Recurrence Online (http://www.recurrenceonline.com/) to calculate the recurrence score and risk using predefined sets of genes in the cDNA microarray. We then compared the prognostic and predictive information provided by histologic grade and genomic signature. RESULTS: Based on genomic signatures, 55%, 28%, and 17% of breast cancers were classified as low, intermediate, and high risk, respectively, whereas the histologic grades were I, II, and III in 22%, 59%, and 19% of breast cancers, respectively. Univariate analysis in the untreated cohort revealed that both histologic grade (overall P = .007) and genomic signature (P < .001) could predict prognosis. Results were similar using the genomic signature, with pathologic complete response rates of 4.6%, 5.7%, and 16.5% for low-, intermediate-, and high-risk cancers, respectively. Neither biomarker was statistically significant in multivariate analysis for predictive response to neoadjuvant chemotherapy (NAC). CONCLUSION: Genomic signature was better at identifying low-risk cases compared to histologic grade alone, but both markers had similar predictive values for NAC response. Better predictive biomarkers for NAC response are still needed.

DOI： 10.1016/j.clbc.2015.10.004

Prognosis after mastectomy versus repeat lumpectomy in patients with ipsilateral breast cancer recurrence: A propensity score analysis. 査読国際誌

A Yoshida, O Takahashi, Y Okumura, N Arima, K Nakatsukasa, M Tanabe, T Shien, N Masuda, S Tanaka, Y Komoike, T Taguchi, T Iwase, R Nishimura, H Inaji, H Yamauchi, M Ishitobi

European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 42 ( 4 ) 474 - 80 2016年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: Mastectomy is the current standard surgical procedure for ipsilateral breast tumor recurrence (IBTR). However, there is little evidence about the prognostic impact of the surgical procedure (mastectomy versus repeat lumpectomy) for IBTR. PATIENTS AND METHODS: A total of 271 consecutive patients who had histologically confirmed IBTR without distant metastases and underwent definitive surgery for IBTR between 1989 and 2008 were included from eight institutions in Japan. The impact of the surgical procedure for IBTR on distant disease-free survival (DDFS) and overall survival (OS) was evaluated using and multivariable proportional hazards regression and propensity score matching methods. RESULTS: Of the 271 patients, 149 patients (55%) underwent repeat lumpectomy and 122 patients (45%) underwent mastectomy after IBTR. The median follow-up period from definitive surgery for IBTR was 55 months. There was no difference in terms of DDFS and OS between repeat lumpectomy and mastectomy after IBTR, adjusted for various clinical and tumor characteristics. In addition, for the matched patient cohort, no difference in DDFS and OS was seen between the 2 groups. CONCLUSION: In our study, both multivariate analysis and the propensity score matching method demonstrated that there was no difference in terms of DDFS and OS between repeat lumpectomy and mastectomy after IBTR. Further studies are warranted (UMIN-CTR number UMIN000008136).

DOI： 10.1016/j.ejso.2016.01.011

その他リンク： http://orcid.org/0000-0001-5536-132X

Metastatic Cutaneous Apocrine Adenocarcinoma Treated With a Combination of Pertuzumab-Based Targeted Therapy and Taxane Chemotherapy: A Case Report. 査読国際誌

Masaki Otsuka, Osamu Yamasaki, Tatsuya Kaji, Tadahiko Shien, Keiji Iwatsuki

JAMA dermatology 152 ( 1 ) 111 - 3 2016年1月

Breast Cancer Metastasis to the Stomach That Was Diagnosed after Endoscopic Submucosal Dissection. 査読国際誌

Masahide Kita, Masashi Furukawa, Masaya Iwamuro, Keisuke Hori, Yoshiro Kawahara, Naruto Taira, Tomohiro Nogami, Tadahiko Shien, Takehiro Tanaka, Hiroyoshi Doihara, Hiroyuki Okada

Case reports in gastrointestinal medicine 2016 2085452 - 2085452 2016年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：HINDAWI LTD

A 52-year-old woman presented with stage IIB primary breast cancer (cT2N1M0), which was treated using neoadjuvant chemotherapy (epirubicin, cyclophosphamide, and paclitaxel). However, the tumor persisted in patchy areas; therefore, we performed modified radical mastectomy and axillary lymph node dissection. Routine endoscopy at 8 months revealed a depressed lesion on the gastric angle's greater curvature, and histology revealed signet ring cell proliferation. We performed endoscopic submucosal dissection for gastric cancer, although immunohistochemistry revealed that the tumor was positive for estrogen receptor, mammaglobin, and gross cystic disease fluid protein-15 (E-cadherin-negative). Therefore, we revised the diagnosis to gastric metastasis from the breast cancer.

DOI： 10.1155/2016/2085452

Kampo medicine in perioperative care for cancer patients 査読

Koji Nishijima, Genichi Nishimura, Toshiaki Saeki, Chikako Shimizu, Hiroyoshi Doihara, Tadahiko Shien

Japanese Journal of Cancer and Chemotherapy 42 ( 13 ) 2430 - 2446 2015年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Japanese Journal of Cancer and Chemotherapy Publishers Inc.

Operative stress causes various changes in the body, and immunological hypofunction and malnutrition increase complications and adversely affect long-term prognosis. Therefore, reducing operative stress as much as possible, minimizing complications after surgery, and aiming for a satisfactory postoperative course are important. However, difficult and unresolvable situations often arise when only the conventional Western medicine approach is used because the situation and condition varies for each patient. We believe that Kampo medicine is very useful in diverse situations. Particularly, Kampo medicine has been used more frequently in recent years, with the expectation of numerous effects, because the effectiveness of Kampo medicine on various disease states has been proven and the pharmacological ingredients and the mechanisms by which Kampo medicine exerts its effects have been better clarified scientifically. Kampo medicine will have an effect in various situations, and we think that Kampo medicine occupies an important position in team-based medical care with multiple specialists. Kampo medicine compounds have been reported to be useful for the following conditions: Hochuekkito and Juzentaihoto for improving immunocompetence after operative stress, Daikenchuto and Rikkunshito for improving postoperative gastrointestinal motility, Shakuyakukanzoto for postoperative wound pain control, Yokukansan for postoperative delirium, and Inchinkoto for postoperative liver dysfunction. The availability of numerous treatment choices that work well in specific situations would be useful for cancer patients during the perioperative period.

[III. Fertility preservation for breast cancer patients--approach at our institution]. 査読

Hiroyoshi Doihara, Tadahiko Shien

Gan to kagaku ryoho. Cancer & chemotherapy 42 ( 13 ) 2444 - 6 2015年12月

Unmet Information Needs and Quality of Life in Young Breast Cancer Survivors in Japan 査読

Mika Miyashita, Shinji Ohno, Akemi Kataoka, Eriko Tokunaga, Norikazu Masuda, Tadahiko Shien, Kimiko Kawabata, Miyako Takahashi

CANCER NURSING 38 ( 6 ) E1 - E11 2015年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：LIPPINCOTT WILLIAMS & WILKINS

Background: Young breast cancer survivors have specific needs related to age. Clarifying the relationships between unmet information needs and quality of life (QOL) in young breast cancer survivors can contribute to constructing a support system to enhance QOL in patients.
Objective: This study aimed to identify the unmet information needs and examine the relationships between unmet information needs and QOL in young breast cancer survivors in Japan.
Methods: Participants completed an information needs questionnaire containing 26 items, the World Health Organization Quality of Life Instrument-Short Form (WHOQOL-BREF), and a demographic and medical information questionnaire.
Results: Fifty participants (30.7%) were unsatisfied with overall communication with medical professionals. The mean scores on all subscales of the WHOQOL-BREF of the participants who were satisfied with overall communication with medical professionals were significantly higher than those of the unsatisfied group. follow-up tests, treatment for recurrence of breast cancer, strategies about communication with medical staff, and nutrition were significantly related with all subscales in the WHOQOL-BREF. Secondary menopause caused by hormonal therapy was significantly related with physical and psychological health.
Conclusions: Japanese young breast cancer survivors have unmet information needs, including age-specific issues. These unmet information needs are related to QOL. In particular, overall communication with medical professionals, which is the most unmet information need, is related to QOL.
Implications for Practice: Oncology nurses should teach patients communication skills, provide adequate information, and provide education and emotional support to medical professionals to improve QOL in young breast cancer survivors.

DOI： 10.1097/NCC.0000000000000201

Impact of modifiable lifestyle factors on outcomes after breast cancer diagnosis: the Setouchi Breast Cancer Cohort Study. 査読国際誌

Naruto Taira, Ichiro Akiyama, Setsuko Ishihara, Youichi Ishibe, Kensuke Kawasaki, Makoto Saito, Tadahiko Shien, Tsunehisa Nomura, Fumikata Hara, Taeko Mizoo, Yuri Mizota, Seiichiro Yamamoto, Shozo Ohsumi, Hiroyoshi Doihara

Japanese journal of clinical oncology 45 ( 6 ) 600 - 2 2015年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

The primary purpose of this large cohort study is to investigate the effects on breast cancer outcomes of modifiable lifestyle factors after breast cancer diagnosis. These factors include physical activity, smoking, alcohol consumption, obesity and weight gain after diagnosis, alternative medicine and dietary factors. Women diagnosed with Stage 0 to III breast cancer are eligible for participation to this study. Lifestyle, use of alternative medicine, psychosocial factors, reproductive factors and health-related quality of life will be assessed using a questionnaire at the time of breast cancer diagnosis (baseline), and 1, 2, 3 and 5 years after diagnosis. Clinical information and breast cancer outcomes will be obtained from a breast cancer database. The primary endpoint will be disease-free survival. Secondary endpoints are overall survival, health-related quality of life, breast cancer-related symptoms and adverse events. Patient recruitment commenced in February 2013. Enrollment of 2000 breast cancer patients is planned during the 5-year recruitment period. The concept of the study is described in this article.

DOI： 10.1093/jjco/hyv033

Assessment of the prognostic and predictive ability of a gene signature compared to histological grade in estrogen receptor positive, HER2 negative breast cancer 査読

Iwamoto Takayuki, Kelly Catherine, Bianchini Giampalo, Mizoo Takeo, Nogami Tomohiro, Motoki Takayuki, Shien Tadahiko, Taira Naruto, Hayashi Naoki, Niikura Naoki, Fujiwara Toshiyoshi, Doihara Hiroyoshi, Matsuoka Junji

CANCER RESEARCH 75 2015年5月

Change in estrogen receptor, HER2, and Ki-67 status between primary breast cancer and ipsilateral breast cancer tumor recurrence. 査読国際誌

Y Okumura, R Nishimura, K Nakatsukasa, A Yoshida, N Masuda, M Tanabe, T Shien, S Tanaka, N Arima, Y Komoike, T Taguchi, T Iwase, H Inaji, M Ishitobi

European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 41 ( 4 ) 548 - 52 2015年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: Changes in the biological marker status between primary and recurrent tumors are observed in breast cancer. However, their clinical significance is still uncertain, especially for patients with ipsilateral breast tumor recurrence (IBTR) after breast-conserving surgery. PATIENTS AND METHODS: A total of 117 patients with IBTR without distant metastases were enrolled in this study. All patients were examined for estrogen receptor (ER), HER2, and Ki-67 in both the primary tumors and paired IBTR. We evaluated the impact of changes in these biomarkers between primary tumors and IBTR on the prognosis after IBTR. RESULTS: There were no associations of changes in the ER, HER2 status with distant disease-free survival (DDFS) after surgical resection of IBTR, whereas the change in the Ki-67 status between the primary tumors and IBTR was significantly correlated with DDFS (unadjusted: p = 0.0094; adjusted: p = 0.013). Patients in the "increased or remained high" Ki-67 group had a significantly shorter DDFS than those in the "decreased or remained low" Ki-67 group (5-year DDFS: 55.5 vs. 79.3%, respectively, p = 0.0084 by log-rank test). CONCLUSION: An increased or persistently high Ki-67 status in the IBTR was significantly correlated with a poorer prognosis after IBTR.

DOI： 10.1016/j.ejso.2015.01.030

その他リンク： http://orcid.org/0000-0001-5536-132X

Correlation between 18F-fluorodeoxyglucose Positron Emission Tomography/computed Tomography and Clinicopathological Features in Invasive Ductal Carcinoma of the Breast. 査読

Maiko Ito, Tadahiko Shien, Mitsumasa Kaji, Taeko Mizoo, Takayuki Iwamoto, Tomohiro Nogami, Takayuki Motoki, Naruto Taira, Hiroyoshi Doihara, Shinichiro Miyoshi

Acta medica Okayama 69 ( 6 ) 333 - 8 2015年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

We evaluated the usefulness of preoperative 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) examinations to predict the pathological features in primary breast cancer. In particular, we evaluated the correlation between the maximum standardized uptake values (SUVmax) obtained by 18F-FDG PET/CT and the Ki67 expression in estrogen receptor (ER)-positive invasive ductal carcinoma (IDC). Primary IDC patients operated between March 2009 and July 2013 at Okayama University Hospital were enrolled. We evaluated the correlations between the SUVmax and age, postoperative pT, histological grade, lymph vascular invasion, status of hormone receptor, human epidermal growth factor receptor 2 (HER2), Ki67 expression and node status. The Ki67 expression was classified as high (＞ 14%) versus low (< 14%). We enrolled 138 patients with IDC. Their median SUVmax was 3.85 (range:0-52.57). In a univariate analysis, the SUVmax was significantly related to age, pT, histological grade, lymphovascular invasion, hormone receptor status, HER2 status, node status and Ki67. In the 113 patients with ER-positive IDC, there was a significant correlation between Ki67 and SUVmax (p ＝ 0.0030). The preoperative 18F-FDG PET/CT results of IDC patients had significant relationships with pathological status parameters. The determination of the preoperative SUVmax might help classify Luminal A and Luminal B patients among luminal-type breast cancer patients.

DOI： 10.18926/AMO/53907

Tamoxifen versus tamoxifen plus doxorubicin and cyclophosphamide as adjuvant therapy for node-positive postmenopausal breast cancer: results of a Japan Clinical Oncology Group Study (JCOG9401) 査読

Tadahiko Shien, Hiroji Iwata, Kenjiro Aogi, Takashi Fukutomi, Kenichi Inoue, Takayuki Kinoshita, Masato Takahashi, Akira Matsui, Taro Shibata, Haruhiko Fukuda

INTERNATIONAL JOURNAL OF CLINICAL ONCOLOGY 19 ( 6 ) 982 - 988 2014年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

Cancer subtype has recently become an increasingly important consideration when deciding the treatment strategy for breast cancer. For the estrogen receptor positive (ER+) subtype, the efficacy of adjuvant endocrine therapy is definitive, but that of adjuvant chemotherapy is controversial.
In order to evaluate the effect of adding doxorubicin (A) and cyclophosphamide (C) to tamoxifen (TAM) (ACT) on the overall survival (OS) of node-positive postmenopausal breast cancer (PMBC) patients, we conducted a randomized trial. Eligibility criteria included pathologically node-positive (n = 1-9) PMBC, stage I-IIIA disease. Patients were randomized to receive either TAM (20 mg daily) for 2 years or A (40 mg/m(2)) and C (500 mg/m(2)) plus TAM (ACT) as adjuvant therapy following surgery.
One hundred twenty-nine patients were recruited (TAM 64, ACT 65) between October 1994 and July 1999. The hazard ratios for OS and relapse-free survival (RFS) were 0.58 (95 % CI 0.24-1.39; log-rank p = 0.22) and 0.45 (95 %CI 0.24-0.86; log-rank p = 0.013), respectively, in favor of ACT. The 5-year OS and RFS were 76.9 % (ER+ 87.1 %, ER- 53.3 %) and 54.9 % (ER+ 59.3 %, ER- 42.9 %) for TAM and 85.0 % (ER+ 90.0 %, ER- 77.1 %) and 76.7 % (ER+ 76.9 %, ER- 76.0 %) for ACT. A higher proportion of the patients receiving ACT than those receiving TAM experienced grade 3 decreased white blood cell count and grade 2-3 nausea.
The efficacy of adding AC to TAM was not high for ER+, node-positive PMBC. However, adjuvant ACT therapy was considered to be effective for ER-, node-positive PMBC.

DOI： 10.1007/s10147-013-0657-z

Repeat lumpectomy for ipsilateral breast tumor recurrence (IBTR) after breast-conserving surgery: the impact of radiotherapy on second IBTR 査読

Makoto Ishitobi, Yasuhiro Okumura, Reiki Nishimura, Katsuhiko Nakatsukasa, Masahiko Tanabe, Atsushi Yoshida, Norikazu Masuda, Tadahiko Shien, Satoru Tanaka, Yoshifumi Komoike, Nobuyuki Arima, Tetsuya Taguchi, Hideo Inaji

BREAST CANCER 21 ( 6 ) 754 - 760 2014年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

There are limited data on the outcomes of patients treated with repeat lumpectomy at the time of ipsilateral breast tumor recurrence (IBTR). Especially, the impact of radiotherapy (RT) on a second IBTR is unknown.
We retrospectively analyzed 143 patients from 8 institutions in Japan who underwent repeat lumpectomy after IBTR. The risk factors of a second IBTR were assessed.
The median follow-up period was 4.8 years. The 5-year second IBTR-free survival rate was 80.7 %. There was a significant difference in the second IBTR-free survival rate according to RT (p = 0.0003, log-rank test). The 5-year second IBTR-free survival rates for patients who received RT after initial surgery, RT after salvage surgery, and no RT were 78.0, 93.5, and 52.7 %, respectively. Multivariate analysis revealed that RT was a significantly independent predictive factor of second IBTR-free survival.
Repeat lumpectomy plus RT is a reasonable option in patients who did not undergo RT at the initial surgery. In contrast, caution is needed when RT is omitted in patients who have undergone repeat lumpectomy.

DOI： 10.1007/s12282-013-0454-6

The discordance between primary breast cancer lesions and pulmonary metastatic lesions in expression of aldehyde dehydrogenase 1-positive cancer cells 査読

Tomohiro Nogami, Tadahiko Shien, Takehiro Tanaka, Hiroyoshi Doihara, Naruto Taira, Daisuke Takabatake, Rieko Nishimura, Keiko Nishiyama, Taeko Mizoo, Shozo Ohsumi

BREAST CANCER 21 ( 6 ) 698 - 702 2014年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

We evaluated the expression of aldehyde dehydrogenase 1 (ALDH1) between primary breast lesions and pulmonary metastatic (PM) lesions in breast cancer patients.
We retrospectively analyzed the clinicopathological features and the expression statuses of ER, PR, HER2, Ki-67 and ALDH-1 in both primary and metastatic breast cancer lesions and evaluated the discordance rates in the expressions of these markers between the primary and metastatic lesions, and also the prognostic value of these factors.
None of the PM patients had metastases at any other sites, and all had undergone curative breast cancer surgery. The pulmonary operation was partial resection in 15 (88 %) patients and lobectomy in 2 (12 %) patients. The median overall survival (OS) after resection of the PNs (OS) was 48 months. The discordance rates in the expressions of ER, PR, HER2, Ki67 and ALDH-1 between the primary and metastatic lesions were 0, 29, 21, 43 and 50 %, respectively.
There was significant discordance in the biomarkers between the primary tumors and the metastatic lesions.

DOI： 10.1007/s12282-013-0445-7

Clinicopathological features of young patients (< 35 years of age) with breast cancer in a Japanese Breast Cancer Society supported study 査読

Akemi Kataoka, Eriko Tokunaga, Norikazu Masuda, Tadahiko Shien, Kimiko Kawabata, Mika Miyashita

BREAST CANCER 21 ( 6 ) 643 - 650 2014年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

To clarify the clinicopathological features of breast cancer in young females, surveillance data of the Registration Committee of the Japanese Breast Cancer Society were analyzed.
The clinicopathological characteristics were compared between young (< 35) patients and non-young (a parts per thousand yen35) patients among 109,617 records registered between 2004 and 2009.
The numbers of young and non-young patients were 2,982 (2.7 %) and 106,295 (97.0 %), respectively. The young patients had more cases of a familial history of breast cancer, more subjective symptoms, fewer bilateral tumors, lower BMIs, larger tumors, more positive lymph nodes, fewer instances of an ER-positive status, more instances of an HER2-positive status, more triple-negative tumors and more advanced TNM stages. The young patients more frequently received neoadjuvant chemotherapy and breast-conserving therapy (BCT) compared with the non-young patients. Eighty percent of all patients received adjuvant therapy. The young patients were more frequently treated with chemotherapy, molecular targeted therapy and radiation therapy than the non-young patients.
In this study, young patients with breast cancer were diagnosed at more advanced stages and had more endocrine-unresponsive tumors than non-young patients. Further prognostic analyses should be conducted in this cohort.

DOI： 10.1007/s12282-013-0466-2

Fertility preservation in breast cancer patients 査読

Tadahiko Shien, Mikiya Nakatsuka, Hiroyoshi Doihara

BREAST CANCER 21 ( 6 ) 651 - 655 2014年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

Systemic therapies have been shown to effectively improve prognosis in patients with breast cancer. However, such therapies also become increasingly harmful as their duration increases, and they have adverse effects on fertility and ovarian function. Fertility preservation (FP) is important in young adult cancer survivors who may wish to have children. In Japan, some cancer societies recommend that the potentially serious effects of systemic therapy on ovarian function should be explained to women with cancer, and they should be encouraged to undergo FP prior to commencing treatment. Still, as there are no official guidelines, many oncologists lack the required knowledge and mind-set to advise young breast cancer patients on fertility issues. Counseling of patients and their families might improve their understanding about the influence of such treatment on fertility and ensure effective FP. There are several FP methods that can be selected before beginning treatment, and these methods have both advantages and disadvantages. Young adults with breast cancer who want to bear children in the future must be provided with FP counseling, in addition to advice about breast cancer treatment and prognosis.

DOI： 10.1007/s12282-013-0463-5

Tamoxifen plus tegafur-uracil (TUFT) versus tamoxifen plus Adriamycin (doxorubicin) and cyclophosphamide (ACT) as adjuvant therapy to treat node-positive premenopausal breast cancer (PreMBC): results of Japan Clinical Oncology Group Study 9404. 査読国際誌

Tadahiko Shien, Hiroji Iwata, Takashi Fukutomi, Kenichi Inoue, Kenjiro Aogi, Takayuki Kinoshita, Jiro Ando, Seiki Takashima, Kenichi Nakamura, Taro Shibata, Haruhiko Fukuda

Cancer chemotherapy and pharmacology 74 ( 3 ) 603 - 9 2014年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

PURPOSE: A prospective randomized clinical trial was conducted to evaluate the efficacy of tamoxifen plus doxorubicin and cyclophosphamide compared to tamoxifen plus tegafur-uracil as an adjuvant therapy to treat node-positive premenopausal breast cancer (PreMBC). METHODS: Eligibility criteria included pathologically node-positive (n = 1-9) preMBC with curative resection, in stages I-IIIA. Patients were randomized to receive either tamoxifen 20 mg/day plus tegafur-uracil 400 mg/day (TU) for 2 years or six courses of a 28-day cycle of doxorubicin 40 mg/m(2) plus cyclophosphamide 500 mg/m(2) on day 1 along with tamoxifen (ACT) given for 2 years as adjuvant therapy. Primary endpoint was overall survival (OS), and secondary endpoint was recurrence-free survival (RFS). RESULTS: In total, 169 patients were recruited (TU arm 87, ACT arm 82) between October 1994 and September 1999. The HR for OS was 0.76 (95 % CI 0.35, 1.66, log-rank p = 0.49) and that for RFS was 0.77 (95 % CI 0.44, 1.36, log-rank p = 0.37), with ACT resulting in a better HR. The 5-year OS was 79.7 % for patients in the TU arm and 83 % for those in the ACT arm. The 5-year RFS was 66.1 % for patients in the TU arm and 70.6 % for those in the ACT arm. A higher proportion of patients in the ACT arm experienced grade 3 leucopenia (0 % in the TU arm, 4 % in the ACT arm). CONCLUSIONS: There were no significant differences in the efficacy of TU and ACT as adjuvant therapy.

DOI： 10.1007/s00280-014-2545-2

Fertility concerns and preservation strategies in young women with breast cancer 査読

Tadahiko Shien

JOURNAL OF THORACIC DISEASE 6 ( 6 ) 581 - 583 2014年6月

Resection of the primary tumor in stage IV breast cancer 査読

Tadahiko Shien, Hiroyoshi Doihara

World Journal of Clinical Oncology 5 ( 2 ) 82 - 85 2014年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Baishideng Publishing Group Co., Limited

Stage IV breast cancer refers to breast cancer that has already metastasized to distant regions when initially diagnosed. Treatment for stage IV is intended to "prolong survival and palliate symptoms". Resection of a primary tumor is considered to be "effective only at alleviating chest symptoms and providing local control" in spite of the advances of imaging examination and medication for breast cancer. Molecular target and endocrine drugs are very effective and useful to tailor-make a treatment strategy according to breast cancer subtypes. Positron emission tomography-computed tomography can detect and diagnose the very small metastases and recurrences which can potentially be cured even if they are distant metastases. Recently, many retrospective studies have reported the survival benefit of surgery for breast cancer patients with metastases and some clinical trials which confirm the surgical prognostic benefit for them have started to enrol patients. The goal of treatment has to be clearly identified: increase the patient's survival time, provide local control or perform histology to determine the cancer's properties. The best evidence is absolutely essential to treat patients who need surgery at the right time. We need to evaluate the treatment strategy, including primary resection for stage IV breast cancer particularly, and find new evidence by prospective analysis.

DOI： 10.5306/wjco.v5.i2.82

A case of carcinoma showing thymus-like differentiation with a rapidly lethal course 査読

Tomohiro Nogami, Naruto Taira, Shinichi Toyooka, Takehiro Tanaka, Taeko Mizoo, Takayuki Iwamoto, Tadahiko Shien, Junichi Soh, Shinichiro Miyoshi, Hiroyoshi Doihara

Case Reports in Oncology 7 ( 3 ) 840 - 844 2014年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：S. Karger AG

A 55-year-old woman underwent a total thyroidectomy for carcinoma showing thymus-like differentiation (CASTLE). The patient was referred to our hospital after the tumor was found to have directly invaded the cervical esophagus and the entire circumference of the trachea. A total thyroidectomy was performed, followed by end-to-end anastomosis of the trachea, suprahyoid release and dissection of bilateral pulmonary ligaments. No major complications, including anastomotic dehiscence or stenosis, were observed. The patient experienced some swallowing disturbances and hoarseness during the perioperative period but fully recovered. Radiotherapy to the neck was performed as an adjuvant therapy. Eleven months after surgery, lower back pain and right leg numbness developed and led to gait inability. Multiple lung and bone recurrences were observed, but no local recurrence. Palliative radiotherapy to the bone metastasis was performed. The patient died of pleural metastasis 14 months after the initial diagnosis of CASTLE.

DOI： 10.1159/000370306

Expression of ALDH1 in axillary lymph node metastases is a prognostic factor of poor clinical outcome in breast cancer patients with 1-3 lymph node metastases 査読

Tomohiro Nogami, Tadahiko Shien, Takehiro Tanaka, Keiko Nishiyama, Taeko Mizoo, Takayuki Iwamto, Hirokuni Ikeda, Naruto Taira, Hiroyoshi Doihara, Shinichiro Miyoshi

BREAST CANCER 21 ( 1 ) 58 - 65 2014年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER JAPAN KK

Recently, evidence in support of the cancer stem cell (CSC) hypothesis has been accumulating. On the other hand, it has been reported that the expression of aldehyde dehydrogenase 1 (ALDH1) in primary breast cancer is a powerful predictor of a poor clinical outcome, and that breast cancer stem cells express ALDH1. According to the CSC hypothesis, development of metastases requires the dissemination of CSC that may remain dormant and be reactivated to cause tumor recurrence. In this study, we investigated whether the detection of CSC in axillary lymph node metastases (ALNM) might be a significant prognostic factor in patients with breast cancer.
From 1998 to 2006, 40 primary breast cancer patients with ALNM, the number of metastatic nodes varying in number from 1 to 3, underwent surgery at Okayama University; of these, 15 patients developed tumor recurrence. We retrospectively evaluated the common clinicopathological features and the expression of ER, HER2, ALDH1, and Ki67 in both the primary lesions and the ALNM, and analyzed the correlations between the expression of these biological markers and the disease-free survival (DFS).
Expression of ALDH1 in the ALNM was significantly associated with the DFS (P = 0.037).
Evaluation of biomarker expression in ALNM could be useful for prognosis in breast cancer patients with 1-3 metastatic lymph nodes.

DOI： 10.1007/s12282-012-0350-5

Estrogen receptor (ER) mRNA expression and molecular subtype distribution in ER-negative/progesterone receptor-positive breast cancers 査読

Mitsuya Itoh, Takayuki Iwamoto, Junji Matsuoka, Tomohiro Nogami, Takayuki Motoki, Tadahiko Shien, Naruto Taira, Naoki Niikura, Naoki Hayashi, Shoichiro Ohtani, Kenji Higaki, Toshiyoshi Fujiwara, Hiroyoshi Doihara, W. Fraser Symmans, Lajos Pusztai

BREAST CANCER RESEARCH AND TREATMENT 143 ( 2 ) 403 - 409 2014年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

We examined estrogen receptor (ER) mRNA expression and molecular subtypes in stage I-III breast cancers that are progesterone receptor (PR) positive but ER and HER2 negative by immunohistochemistry (IHC) or fluorescent in situ hybridization. The ER, PR, and HER2 status was determined by IHC as part of routine clinical assessment (N = 501). Gene expression profiling was done with the Affymetrix U133A gene chip. We compared expressions of ESR1 and MKI67 mRNA, distribution of molecular subtypes by the PAM50 classifier, the sensitivity to endocrine therapy index, and the DLDA30 chemotherapy response predictor signature among ER/PR-positive (n = 223), ER-positive/PR-negative (<Emphasis Type="ItalicUnderline">n = 73), ER-negative/PR-positive (n = 20), and triple-negative (n = 185) cancers. All patients received neoadjuvant chemotherapy with an anthracycline and taxane and had adjuvant endocrine therapy only if ER or PR > 10 % positive. ESR1 expression was high in 25 % of ER-negative/PR-positive, in 79 % of ER-positive/PR-negative, in 96 % of ER/PR-positive, and in 12 % of triple-negative cancers by IHC. The average MKI67 expression was significantly higher in the ER-negative/PR-positive and triple-negative cohorts. Among the ER-negative/PR-positive patients, 15 % were luminal A, 5 % were Luminal B, and 65 % were basal like. The relapse-free survival rate of ER-negative/PR-positive patients was equivalent to ER-positive cancers and better than the triple-negative cohort. Only 20-25 % of the ER-negative/PR-positive tumors show molecular features of ER-positive cancers. In this rare subset of patients (i) a second RNA-based assessment may help identifying the minority of ESR1 mRNA-positive, luminal-type cancers and (ii) the safest clinical approach may be to consider both adjuvant endocrine and chemotherapy.

DOI： 10.1007/s10549-013-2763-z

Effects of lifestyle and single nucleotide polymorphisms on breast cancer risk: a case-control study in Japanese women 査読

Taeko Mizoo, Naruto Taira, Keiko Nishiyama, Tomohiro Nogami, Takayuki Iwamoto, Takayuki Motoki, Tadahiko Shien, Junji Matsuoka, Hiroyoshi Doihara, Setsuko Ishihara, Hiroshi Kawai, Kensuke Kawasaki, Youichi Ishibe, Yutaka Ogasawara, Yoshifumi Komoike, Shinichiro Miyoshi

BMC CANCER 13 565 2013年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BIOMED CENTRAL LTD

Background: Lifestyle factors, including food and nutrition, physical activity, body composition and reproductive factors, and single nucleotide polymorphisms (SNPs) are associated with breast cancer risk, but few studies of these factors have been performed in the Japanese population. Thus, the goals of this study were to validate the association between reported SNPs and breast cancer risk in the Japanese population and to evaluate the effects of SNP genotypes and lifestyle factors on breast cancer risk.
Methods: A case-control study in 472 patients and 464 controls was conducted from December 2010 to November 2011. Lifestyle was examined using a self-administered questionnaire. We analyzed 16 breast cancer-associated SNPs based on previous GWAS or candidate-gene association studies. Age or multivariate-adjusted odds ratios (OR) and 95% confidence intervals (95% CI) were estimated from logistic regression analyses.
Results: High BMI and current or former smoking were significantly associated with an increased breast cancer risk, while intake of meat, mushrooms, yellow and green vegetables, coffee, and green tea, current leisure-time exercise, and education were significantly associated with a decreased risk. Three SNPs were significantly associated with a breast cancer risk in multivariate analysis: rs2046210 (per allele OR = 1.37 [95% CI: 1.11-1.70]), rs3757318 (OR = 1.33[1.05-1.69]), and rs3803662 (OR = 1.28 [1.07-1.55]). In 2046210 risk allele carriers, leisure-time exercise was associated with a significantly decreased risk for breast cancer, whereas current smoking and high BMI were associated with a significantly decreased risk in non-risk allele carriers.
Conclusion: In Japanese women, rs2046210 and 3757318 located near the ESR1 gene are associated with a risk of breast cancer, as in other Asian women. However, our findings suggest that exercise can decrease this risk in allele carriers.

DOI： 10.1186/1471-2407-13-565

Breast cancer subtype and distant recurrence after ipsilateral breast tumor recurrence. 査読国際誌

Makoto Ishitobi, Yasuhiro Okumura, Nobuyuki Arima, Atsushi Yoshida, Katsuhiko Nakatsukasa, Takuji Iwase, Tadahiko Shien, Norikazu Masuda, Satoru Tanaka, Masahiko Tanabe, Takehiro Tanaka, Yoshifumi Komoike, Tetsuya Taguchi, Reiki Nishimura, Hideo Inaji

Annals of surgical oncology 20 ( 6 ) 1886 - 92 2013年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

BACKGROUND: There is little information about the impact of breast cancer subtype on prognosis after ipsilateral breast tumor recurrence (IBTR). METHODS: One hundred eighty-five patients were classified according to breast cancer subtype, as approximated by estrogen receptor, human epidermal growth factor receptor 2 (HER2), and Ki-67, of IBTR, and we evaluated whether breast cancer subtype was associated with distant recurrence after IBTR. RESULTS: There was a significant difference in distant disease-free survival (DDFS) after IBTR according to breast cancer subtype defined by a cutoff of the Ki-67 index of 20 % (p = 0.0074, log-rank test). The 5-year DDFS rates for patients with luminal A, luminal B, triple-negative, and HER2 types were 86.3, 57.1, 56.6, and 65.9 %, respectively. In addition, breast cancer subtype was significantly associated with distant recurrence after IBTR on adjustment for various clinicopathologic factors (p = 0.0027, Cox proportional hazards model). CONCLUSIONS: Our study suggests that breast cancer subtype based on immunohistochemical staining predicts the outcomes of patients with IBTR. Further analyses are needed (UMIN-CTR number UMIN000008136).

DOI： 10.1245/s10434-012-2825-1

p53 Expression in Pretreatment Specimen Predicts Response to Neoadjuvant Chemotherapy Including Anthracycline and Taxane in Patients with Primary Breast Cancer 査読

Tadahiko Shien, Takayuki Kinoshita, Kunihiko Seki, Miwa Yoshida, Takashi Hojo, Chikako Shimizu, Naruto Taira, Hiroyoshi Doihara, Sadako Akashi-Tanaka, Hitoshi Tsuda, Yasuhiro Fujiwara

ACTA MEDICA OKAYAMA 67 ( 3 ) 165 - 170 2013年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

While clinical and pathologic responses are important prognostic parameters, biological markers from core needle biopsy (CNB) are needed to predict neoadjuvant chemotherapy (NAC) response, to individualize treatment, and to achieve maximal efficacy. We retrospectively evaluated the cases of 183 patients with primary breast cancer who underwent surgery after NAC (anthracycline and taxane) at the National Cancer Center Hospital (NCCH). We analyzed EGFR, HER2, and p53 expression and common clinicopathological features from the CNB and surgical specimens of these patients. These biological markers were compared between sensitive patients (pathological complete response; pCR) and insensitive patients (clinical no change; cNC and clinical progressinve disease; cPD). In a comparison between the 9 (5%) sensitive patients and 30 (16%) insensitive patients, overexpression of p53 but not overexpression of either HER2 or EGFR was associated with a good response to NAC. p53 = 0.045) and histological grade 3 (p = 0.011) were important and significant predictors of the response to NAC. The correspondence rates for histological type, histological grade 3, ER, PgR, HER2, p53, and EGFR in insensitive patients between CNB and surgical specimens were 70%, 73%, 67%, 70%, 80%, 93%, and 73%. The pathologic response was significantly associated with p53 expression and histological grade 3. The correspondence rate of p53 expression between CNB and surgical specimens was higher than that of other factors. We conclude that the level of p53 expression in the CNB was an effective and reliable predictor of treatment response to NAC.

DOI： 10.18926/AMO/50409

Association between mammographic breast density and lifestyle in japanese women 査読

Setsuko Ishihara, Naruto Taira, Kensuke Kawasakic, Youichi Ishibe, Taeko Mizoo, Keiko Nishiyama, Takayuki Iwamoto, Tomohiro Nogami, Takayuki Motoki, Tadahiko Shieir, Junji Matsuoka, Hiroyoshi Doihara, Yoshifumi Komoike, Shuhei Sato, Susumu Kanazawa

Acta Medica Okayama 67 ( 3 ) 145 - 151 2013年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

A high mammographic breast density is considered to be a risk factor for breast cancer. However, only a small number of studies on the association between breast density and lifestyle have been per- formed. A cross-sectional study was performed using a survey with 29 questions on life history and lifestyle. The breast density on mammography was classified into 4 categories following the BI-RADS criteria. The subjects were 522 women with no medical history of breast cancer. The mean age was 53.3 years old. On multivariate analysis, only BMI was a significant factor determining breast density in premenopausal women (parameter estimate, 0.403
p value, 0.0005), and the density decreased as BMI rose. In postmenopausal women, BMI (parameter estimate, 0.196
p value, 0.0143) and number of deliveries (parameter estimate, 0.388
p value, 0.0186) were significant factors determining breast density
breast density decreased as BMI and number of deliveries increased. Only BMI and number of deliveries were identified as factors significantly influencing breast density. BMI was inversely cor- related with breast density before and after menopause, whereas the influence of number of deliveries on breast density was significant only in postmenopausal women in their 50 and 60s. © 2013 by Okayama University Medical School.

DOI： 10.18926/AMO/50407

A Randomized Controlled Trial Comparing Primary Tumour Resection Plus Systemic Therapy With Systemic Therapy Alone in Metastatic Breast Cancer (PRIM-BC): Japan Clinical Oncology Group Study JCOG1017 査読

Tadahiko Shien, Kenichi Nakamura, Taro Shibata, Takayuki Kinoshita, Kenjiro Aogi, Tomomi Fujisawa, Norikazu Masuda, Kenichi Inoue, Haruhiko Fukuda, Hiroji Iwata

JAPANESE JOURNAL OF CLINICAL ONCOLOGY 42 ( 10 ) 970 - 973 2012年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

This trial is being conducted to confirm the superiority, in terms of overall survival, of primary tumour resection plus systemic therapy to systemic therapy alone in patients with Stage IV breast cancer who are not refractory to primary systemic therapy. The inclusion criteria for the study are as follows: untreated patients with histologically confirmed invasive breast cancer with one or more measurable metastatic lesions diagnosed by radiological examination. All patients receive primary systemic therapy according to the estrogen receptor and human epidermal growth factor receptor type-2 status of the primary breast cancer after the first registration. After 3 months, the patients without disease progression are randomized to the primary tumour resection plus systemic therapy arm or the systemic therapy alone arm. The primary endpoint is the overall survival, and the secondary endpoints are proportion of patients without tumour progression at the metastatic sites, yearly local recurrence-free survival, proportion of local ulcer/local bleeding, yearly primary tumour resection-free survival, adverse events of chemotherapy, operative morbidity and serious adverse events. The patient recruitment was commenced in May 2011. Enrolment of 410 patients for randomization is planned over a 5 year recruitment period. We hereby report the details of the study.

DOI： 10.1093/jjco/hys120

Ectopic Cervical Thymoma: A Case Report with F-18-fluorodeoxyglucose Positron Emission Tomography Findings 査読

Kazuhiko Shien, Tadahiko Shien, Junichi Soh, Hirokuni Ikeda, Tomohiro Nogami, Naruto Taira, Hiroyoshi Doihara, Shinichiro Miyoshi

ACTA MEDICA OKAYAMA 66 ( 4 ) 357 - 361 2012年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

Ectopic thymoma is considered to arise from ectopic thymus tissue deposited as a result of the abnormal mislocalization of thymus tissue during the embryonic stage. An 86-year-old man visited our hospital with chief complaints of hoarseness and a mass in his anterior neck. A preoperative needle biopsy of the mass did not yield a definitive diagnosis. A positron emission tomography (PET) study revealed heterogeneous accumulation of F-18-fluorodeoxyglucose (FDG) in the tumor. The tumor, affecting the left sternocleidomastoid muscle, the recurrent laryngeal nerve, the internal carotid vein, and the brachiocephalic vein, was resected using a combination of a collar incision in the neck and a median incision in the sternum. Immunohistochemically, the tumor was diagnosed as an ectopic thymoma of the neck. To date, only a few cases of ectopic thymoma presenting with FDG accumulation have been reported. Our experience indicates that ectopic thymoma should be kept in mind during the differential diagnosis of neck tumors with FDG accumulation appearing on PET images.

DOI： 10.18926/AMO/48691

DNA methylation status of REIC/Dkk-3 gene in human malignancies 査読

Tatsuro Hayashi, Hiroaki Asano, Shinichi Toyooka, Kazunori Tsukuda, Junichi Soh, Tadahiko Shien, Naruto Taira, Yuho Maki, Norimitsu Tanaka, Hiroyoshi Doihara, Yasutomo Nasu, Nam-ho Huh, Shinichiro Miyoshi

JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY 138 ( 5 ) 799 - 809 2012年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

The REIC (reduced expression in immortalized cells)/Dkk-3 is down-regulated in various cancers and considered to be a tumor suppressor gene. REIC/Dkk-3 mRNA has two isoforms (type-a,b). REIC type-a mRNA has shown to be a major transcript in various cancer cells, and its promoter activity was much stronger than that of type-b. In this study, we examined the methylation status of REIC/Dkk-3 type-a in a broad range of human malignancies.
We examined REIC/Dkk-3 type-a methylation in breast cancers, non-small-cell lung cancers, gastric cancers, colorectal cancers, and malignant pleural mesotheliomas using a quantitative combined bisulfite restriction analysis assay and bisulfate sequencing. REIC/Dkk-3 type-a and type-b expression was examined using reverse transcriptional PCR. The relationships between the methylation and clinicopathological factors were analyzed.
The rate of REIC/Dkk-3 type-a methylation ranged from 26.2 to 50.0% in the various primary tumors that were examined. REIC/Dkk-3 type-a methylation in breast cancer cells was significantly heavier than that in the other cell lines that we tested. REIC/Dkk-3 type-a methylation was inversely correlated with REIC/Dkk-3 type-a expression. There was a correlation between REIC/Dkk-3 type-a and type-b mRNA expression. REIC/Dkk-3 type-a expression was restored in MDA-MB-231 cells using 5-aza-2'-deoxycytidine treatment. We found that estrogen receptor-positive breast cancers were significantly more common among the methylated group than among the non-methylated group.
REIC/Dkk-3 type-a methylation was frequently detected in a broad range of cancers and appeared to play a key role in silencing REIC/Dkk-3 type-a expression in these malignancies.

DOI： 10.1007/s00432-012-1158-6

意思決定におけるピアサポート効果術後パートナーとの関係に不安を持つ一事例を通して

露無祐子, 小野美穂, 岡田知子, 渡部聡子, 元木崇之, 枝園忠彦, 平成人, 松岡順治, 木股敬裕, 土井原博義

日本乳癌学会総会プログラム抄録集 20回 550 - 550 2012年5月

A radial sclerosing lesion mimicking breast cancer on mammography in a young woman 査読

Masashi Furukawa, Naruto Taira, Shigemichi Iha, Tomohiro Nogami, Tadahiko Shien, Masako Omori, Hiroyoshi Doihara

Case Reports in Oncology 5 ( 1 ) 99 - 103 2012年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

A spiculated mass on a mammogram is highly suggestive of malignancy. We report the case of a 32-year-old woman with a radial sclerosing lesion that mimicked breast cancer on mammography. She visited her physician after palpating a lump in her left breast. Mammography showed architectural distortion in the upper inner quadrant of the left breast. Ultrasonography showed a low echoic area with an ambiguous boundary. Core needle biopsy was performed because of the suspicion of malignancy. Histological examination did not reveal any malignant cells. After 6 months, the breast lump became larger and the patient was referred to our hospital. Mammography performed in our hospital showed a spiculated mass, and therefore mammotome biopsy was performed. Histological examination revealed dense fibroelastic stroma with a wide variety of mastopathic changes, leading to a diagnosis of a radial sclerosing lesion. One year after the biopsy, the lump on her left breast had disappeared and mammography showed no spiculated mass. Copyright © 2012 S. Karger AG, Basel.

DOI： 10.1159/000337024

Combination treatment with fulvestrant and various cytotoxic agents (doxorubicin, paclitaxel, docetaxel, vinorelbine, and 5-fluorouracil) has a synergistic effect in estrogen receptor-positive breast cancer 査読

Hirokuni Ikeda, Naruto Taira, Tomohiro Nogami, Kazuhiko Shien, Masanori Okada, Tadahiko Shien, Hiroyoshi Doihara, Shinichiro Miyoshi

CANCER SCIENCE 102 ( 11 ) 2038 - 2042 2011年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-BLACKWELL

Patients with estrogen receptor (ER)-positive breast cancers have a better prognosis than those with ER-negative breast cancers, but often have low sensitivity to chemotherapy and a limited survival benefit. We have previously shown a combination effect of taxanes and fulvestrant and suggested that this treatment may be useful for ER-positive breast cancer. In this study, we evaluated the effects of combinations of hormone drugs and chemotherapeutic agents. In vitro, the effects of combinations of five chemotherapeutic agents (doxorubicin, paclitaxel, docetaxel, vinorelbine, and 5-fluorouracil) and three hormone drugs (fulvestrant, tamoxifen, and 4-hydroxytamoxifen) were examined in ER-positive breast cancer cell lines using CalcuSyn software. Changes in chemoresistant factors such as Bcl2, multidrug resistance-associated protein 1, and microtubule-associated protein tau were also examined after exposure of the cells to hormone drugs. In vivo, tumor sizes in mice were evaluated after treatment with docetaxel or doxorubicin alone, fulvestrant alone, and combinations of these agents. Combination treatment with fulvestrant and all five chemotherapeutic agents in vitro showed synergistic effects. In contrast, tamoxifen showed an antagonistic effect with all the chemotherapeutic agents. 4-Hydroxytamoxifen showed an antagonistic effect with doxorubicin and 5-fluorouracil, but a synergistic effect with taxanes and vinorelbine. Regarding chemoresistant factors, Bcl2 and microtubule-associated protein tau were downregulated by fulvestrant. In vivo, a combination of fulvestrant and docetaxel had a synergistic effect on tumor growth, but fulvestrant and doxorubicin did not show this effect. In conclusion, fulvestrant showed good compatibility with all the evaluated chemotherapeutic agents, and especially with docetaxel, in vitro and in vivo. (Cancer Sci 2011; 102: 2038-2042)

DOI： 10.1111/j.1349-7006.2011.02050.x

Functional interaction of fibroblast growth factor-8, bone morphogenetic protein and estrogen receptor in breast cancer cell proliferation 査読

Hiroko Masuda, Fumio Otsuka, Yoshinori Matsumoto, Mariko Takano, Tomoko Miyoshi, Kenichi Inagaki, Tadahiko Shien, Naruto Taira, Hirofumi Makino, Hiroyoshi Doihara

MOLECULAR AND CELLULAR ENDOCRINOLOGY 343 ( 1-2 ) 7 - 17 2011年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER IRELAND LTD

Estrogen is involved in the development and progression of breast cancer. Here we investigated the effect of fibroblast growth factor (FGF)-8 on breast cancer cell proliferation caused by estrogen using human breast cancer MCF-7 cells. MCF-7 cells express estrogen receptor (ER)alpha, ER beta, FGF receptors, and Smad signaling molecules. Estradiol stimulated MCF-7 cell proliferation in a concentration-responsive manner, whereas BSA-bound estradiol had a weak effect on MCF-7 cell mitosis compared with the effect of free estradiol. It is notable that estrogen-induced cell proliferation was enhanced in the presence of FGF-8 and that the combined effects were reversed in the presence of an FGF-receptor kinase inhibitor or an ER antagonist. It was also revealed that FGF-8 increased the expression levels of ER alpha, ER beta and aromatase mRNAs, while estradiol reduced the expression levels of ERs, aromatase and steroid sulfatase in MCF-7 cells. FGF-8-induced phosphorylation of FGF receptors was augmented by estradiol, which was reversed by an ER antagonist. FGF-8-induced activation of MAPKs and AKT signaling was also upregulated in the presence of estrogen. On the other hand, FGF-8 suppressed BMP-7 actions that are linked to mitotic inhibition by activating the cell cycle regulator cdc2. FGF-8 was revealed to inhibit BMP receptor actions including Id-1 promoter activity and Smad1/5/8 phosphorylation by suppressing expression of BMP type-II receptors and by increasing expression of inhibitory Smads. Collectively, the results indicate that FGF-8 acts to facilitate cell proliferation by upregulating endogenous estrogenic actions as well as by suppressing BMP receptor signaling in ER-expressing breast cancer cells. (C) 2011 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/j.mce.2011.05.037

Clinical Efficacy of Capecitabine and Cyclophosphamide (XC) in Patients with Metastatic Breast Cancer 査読

Tadahiko Shien, Hiroyoshi Doihara, Keiko Nishiyama, Hiroko Masuda, Tomohiro Nogami, Hirokuni Ikeda, Naruto Taira

ACTA MEDICA OKAYAMA 65 ( 4 ) 231 - 237 2011年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

Combined low-dose therapy of oral capecitabine (Xeloda) and cyclophosphamide (XC) has been demonstrated to be useful for long-term control of lesions in patients with metastatic breast cancer (MBC) and is aimed at symptomatic alleviation and prolongation of survival. Here, a retrospective review was conducted of MBC patients administered XC at the Okayama University Hospital (OUH), to evaluate responses to XC, adverse events and time to progression (TTP). Twenty patients with MBC received XC between 2006 and 2009. With the exception of 2 elderly patients who were over the age of 70 at the initial examination, all of the patients had received prior treatment with an anthracycline and/or a taxane. No complete response (CR) cases were observed, but partial response (PR) was achieved in 6 patients (30%) and SD in 9 (45%), of whom 5 (20%) sustained SD status for >= 12 months. The median TTP was 6 months (range: 3-27 mo.). Three patients developed Grade 3 adverse events (diarrhea, nausea and stomatitis), but no other patients developed adverse reactions causing interruption of the therapy. XC was safe even in previously treated and elderly MBC patients; moreover, it yielded remarkable clinical responses.

DOI： 10.18926/AMO/46848

A case of the usage of entecavir to prevent hepatitis B virus reactivation during chemotherapy in breast cancer patient 査読

Takayuki Muraoka, Naruto Taira, Tadahiko Shien, Hiroyoshi Doihara, Akinobu Takaki, Shinichiro Miyoshi

Japanese Journal of Cancer and Chemotherapy 38 ( 11 ) 1861 - 1864 2011年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Japanese Journal of Cancer and Chemotherapy Publishers Inc.

Hepatitis B virus (HBV) reactivation is a serious clinical problem for HBV infected patients, and one of its possible causes is chemotherapy for malignant disease. At the onset of active hepatitis, planned chemotherapy should be discontinued and acute or fetal fulminant hepatitis must be induced in some cases. Therefore, it is desirable to prevent virus reactivation during chemotherapy in HBV-positive patients. We report a case in which adjuvant chemotherapy for a breast cancer patient was accomplished safely by using entecavir. The patient was a 48-year-old woman with breast cancer whose HBV infection had been pointed out when she was 20 years old. Breast reconstruction was performed, followed by mastectomy. Pathological findings were invasive ductal carcinoma, three positive nodes, estrogen and progesterone receptor-positive, and HER2-negative. An adjuvant chemotherapy with anthracycline followed by taxane was planned. Blood chemistry revealed the seroconversion of HBV and the quantity of HBV-DNA was 2. 8 log copies/mL. Administration of the anti-virus agent, entecavir, was started three weeks before chemotherapy. The HBV-DNA was decreased under the titer of detection and no re-increase in HBV-DNA was found during chemotherapy. Planned chemotherapy was accomplished safely without HBV reactivation.

The estrogen receptor influences microtubule-associated protein tau (MAPT) expression and the selective estrogen receptor inhibitor fulvestrant downregulates MAPT and increases the sensitivity to taxane in breast cancer cells 査読

Hirokuni Ikeda, Naruto Taira, Fumikata Hara, Takeo Fujita, Hiromasa Yamamoto, Junichi Soh, Shinichi Toyooka, Tomohiro Nogami, Tadahiko Shien, Hiroyoshi Doihara, Shinichiro Miyoshi

BREAST CANCER RESEARCH 12 ( 3 ) R43 2010年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BIOMED CENTRAL LTD

Introduction: Microtubule-associated protein tau (MAPT) inhibits the function of taxanes and high expression of MAPT decreases the sensitivity to taxanes. The relationship between estrogen receptor (ER) and MAPT in breast cancer is unclear. In this study, we examined the correlation of MAPT expression with the sensitivity of human breast cancer cells to taxanes, and the relationship between ER and MAPT.
Methods: The correlation between MAPT expression and sensitivity to taxanes was investigated in 12 human breast cancer cell lines. Alterations in cellular sensitivity to taxanes were evaluated after knockdown of MAPT expression. ER expression was knocked down or stimulated in MAPT-and ER-positive cell lines to examine the relationship between ER and MAPT. The cells were also treated with hormone drugs (tamoxifen and fulvestrant) and taxanes.
Results: mRNA expression of MAPT did not correlate with sensitivity to taxanes. However, expression of MAPT protein isoforms of less than 70 kDa was correlated with a low sensitivity to taxanes. Downregulation of MAPT increased cellular sensitivity to taxanes. MAPT protein expression was increased by stimulation with 17-beta-estradiol or tamoxifen, but decreased by ER downregulation and by fulvestrant, an ER inhibitor. The combination of fulvestrant with taxanes had a synergistic effect, whereas tamoxifen and taxanes had an antagonistic effect.
Conclusions: Expression of MAPT protein isoforms of less than 70 kDa is correlated with a low sensitivity to taxanes in breast cancer cells. ER influences MAPT expression and fulvestrant increases the sensitivity to taxanes in MAPT-and ER-positive breast cancer cells.

DOI： 10.1186/bcr2598

乳腺原発血管肉腫の脳転移に対して放射線治療が有効であった1例

西山慶子, 平成人, 増田紘子, 野上智弘, 杉本龍士郎, 池田宏国, 枝園忠彦, 土井原博義, 三好新一郎

日本臨床外科学会雑誌 70 ( 増刊 ) 909 - 909 2009年10月

当院における乳房再建術症例の検討

増田紘子, 枝園忠彦, 西山慶子, 野上智弘, 杉本龍士郎, 池田宏国, 平成人, 元木崇之, 松岡順治, 土井原博義, 三好新一郎, 徳山英二郎, 木股敬裕

日本臨床外科学会雑誌 70 ( 増刊 ) 402 - 402 2009年10月

21-Gene expression profile assay on core needle biopsies predicts responses to neoadjuvant endocrine therapy in breast cancer patients 査読

Sadako Akashi-Tanaka, Chikako Shimizu, Masashi Ando, Tatsuhiro Shibata, Noriyuki Katsumata, Tsutomu Kouno, Kotoe Terada, Tadahiko Shien, Miwa Yoshida, Takashi Hojo, Takayuki Kinoshita, Yasuhiro Fujiwara, Kenichi Yoshimura

BREAST 18 ( 3 ) 171 - 174 2009年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CHURCHILL LIVINGSTONE

This study examined postmenopausal estrogen receptor-positive breast cancer patients who received prospective neoadjuvant endocrine therapy (NAET) with tamoxifen or anastrozole to determine if the 21-gene recurrence score (RS) predicts NAET responses. RS scores were determined from pretreatment core biopsy specimens. Although half of the specimens yielded insufficient RNA, the remaining samples were highly representative. Patients with a low RS tended to respond better than those with an intermediate or high RS (n = 43). Response rates by RS were similar between the tamoxifen and anastrozole groups. Patients with a low RS tended to have better relapse-free Survival (RFS) than those with ail intermediate or high RS (5y-RFS; 100% vs. 84% and 73%, respectively). These results suggest that RS predicts responses to NAET with tamoxifen or anastrozole. Because this pilot study examined a small sample size, these results should be validated in larger studies. (C) 2009 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.breast.2009.03.005

HER2陽性高齢者乳癌に対する術後補助療法に関するTrastuzumabと化療併用のRCT:N-SAS BC07 QOL pilot試験

平成人, 澤木正孝, 下妻晃二郎, 高橋都, 福田敬, 白岩健, 田中夕香理, 枝園忠彦, 土井原博義, 大橋靖雄

日本乳癌学会総会プログラム抄録集 17回 435 - 435 2009年6月

Primary tumor resection improves the survival of younger patients with metastatic breast cancer 査読

Tadahiko Shien, Takayuki Kinoshita, Chikako Shimizu, Takashi Hojo, Naruto Taira, Hiroyoshi Doihara, Sadako Akashi-Tanaka

ONCOLOGY REPORTS 21 ( 3 ) 827 - 832 2009年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPANDIDOS PUBL LTD

Current treatments for metastatic breast cancer (MBC) include palliation with chemotherapy and/or hormone therapy, neither of which has the effect of adequately improving survival. Local surgery to remove the primary breast tumor is performed to improve local control and prevent uncontrolled chest wall disease (UCD). From June 1962 to February 2007 7 344 patients with MBC were treated at National Cancer Center Hospital. In our review of these cases, we evaluated the prognostic impact of local surgery and other clinicopathological features. One hundred and sixty patients (47%) underwent resection of primary breast tumor, while 184 (53%) patients were treated without surgery. Overall survival (OS) was prolonged in patients treated with surgery (p=0.049), younger patients (age < 50, p=0.023), and patients with bone or soft tissue metastases (p=0.013). While surgery significantly improved OS in young patients (p=0.021), it did not increase OS in older patients (age > 51, p=0.665) or patients with visceral metastasis (p=0.797). This study demonstrated that local surgery improved OS of patients with MBC; local surgery should therefore be considered, especially in young patients. Prospective studies are required to validate these findings and evaluate the impact of surgical intervention.

DOI： 10.3892/or_00000291

Whole-breast volume perfusion images using 256-row multislice computed tomography: visualization of lesions with ductal spread 査読

Sadako Akashi-Tanaka, Tadahiko Shien, Shinsuke Tsukagoshi, Shintaro Funabasama, Kunihisa Miyagawa, Kotoe Terada, Miwa Yoshida, Takashi Hojo, Takayuki Kinoshita, Noriyuki Moriyama

BREAST CANCER 16 ( 1 ) 62 - 67 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER TOKYO

Background The aim of this study was to apply perfusion techniques to breast tumors using a prototype 256-row multislice computed tomography (CT) scanner (which allows a wide range of 128 mm to be scanned and can provide whole-breast perfusion maps without any dead angles) to improve contrast and assess the possibility of precisely depicting the extent of breast cancer.
Patients and methods The study group included seven patients with breast cancer who were scheduled to undergo radical surgery and radiotherapy. Dynamic scanning was performed using a 256-row multislice CT scanner during normal respiration. Volume perfusion images of the entire breast were obtained using the maximum slope method. Perfusion map images and early-phase breast CT images at 54 s were compared by means of pathological examination.
Results All breast cancers could be distinguished from normal mammary glands based on the perfusion value. The extent of cancer depicted in perfusion images showed excellent agreement with the pathology findings for invasive ductal carcinoma and ductal carcinoma in situ. In three patients, all ductal spread, parts of which were not visualized by early-phase CT, were depicted in volume perfusion images. Simulation analysis suggested that perfusion maps could be generated with fewer scanning points.
Conclusion The results of the present study suggest that volume perfusion imaging may be useful for depicting the extent of breast cancer, with excellent sensitivity. Further research is needed to determine the clinical relevance of these findings.

DOI： 10.1007/s12282-008-0076-6

Primary small cell carcinoma of the breast 査読

Takashi Hojo, Takayuki Kinoshita, Tadahiko Shien, Kotoe Terada, Shigemichi Hirose, You Isobe, Shunji Ikeuchi, Kiyoshi Kubochi, Sumio Matsumoto, Akashi-Tanaka Sadako

BREAST CANCER 16 ( 1 ) 68 - 71 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER TOKYO

Primary small cell carcinoma of the breast is a very rare disease, and only a few case reports have described small cell carcinoma of the breast that responds to chemotherapy. Here, we report a case of primary small cell carcinoma of the breast that was treated with surgery and chemotherapy for postoperative local recurrence in the chest wall and metastasis to the liver. The metastatic lesions showed a partial response (PR) to carboplatin and irinotecan, but did not respond to subsequent Taxotere and doxifluridine (5'-DFUR) treatment. We then treated the metastatic lesions with CBDCA and etoposide (VP-16), and were able to stop disease progression. Small cell carcinoma of the breast is as aggressive as its pulmonary counterpart. Therefore, the best therapy for primary small cell carcinoma of the breast may be surgery followed by adjuvant therapy similar to that recommended for small cell lung carcinoma.

DOI： 10.1007/s12282-008-0057-9

Usefulness of preoperative multidetector-row computed tomography in evaluating the extent of invasive lobular carcinoma in patients with or without neoadjuvant chemotherapy 査読

Tadahiko Shien, Sadako Akashi-Tanaka, Miwa Yoshida, Takashi Hojo, Eriko Iwamoto, Kunihisa Miyagawa, Takayuki Kinoshita

BREAST CANCER 16 ( 1 ) 30 - 36 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER TOKYO

Background The present study was conducted to assess the clinical usefulness of multidetector-row CT (MDCT) in determining the extent of invasive lobular carcinoma (ILC) and especially the extent of residual tumor after neoadjuvant chemotherapy (NAC).
Patients and methods The subjects were 24 patients with primary ILC who underwent surgery without NAC and 17 patients with ILC who underwent surgery after NAC at National Cancer Center Hospital (NCCH) between April 1999 and December 2005. The extent of primary ILC was assessed by ultrasound, mammography, and MDCT before surgery, and the results obtained using each modality were compared with the results of pathological examination after surgery. In addition, the characteristic findings of ILC obtained by MDCT were assessed. Similarly, the extent of residual tumor after NAC was evaluated using ultrasound, mammography, and MDCT before surgery in the subjects who underwent NAC, and the results obtained by each modality were compared with the results of pathological examination after surgery.
Results The findings of primary ILC obtained by MDCT showed that the carcinoma was the non-localized type rather than the localized type in 63% of the subjects. In addition, with regard to the pattern of time-sequential contrast enhancement, the persistent pattern (in which tumor enhancement is strong in the late phase rather than in the early phase) was observed in 46% of the subjects, and the plateau pattern (in which contrast enhancement is weak in both the early phase and the late phase) was observed in 38% of the subjects. These trends were significant in the subjects who underwent NAC and in whom tumor enhancement could not be clearly observed by MDCT. Assessment of the extent of carcinoma showed that the diagnostic accuracy of MDCT was 79%, as compared with 71% for either ultrasound or mammography. Assessment of the extent of carcinoma after NAC also showed that the diagnostic accuracy of MDCT was 71%, as compared with 48% for ultrasound and 53% for mammography, indicating that MDCT provided the highest accuracy. It should be noted that for all modalities, the extent of ILC was not overestimated as compared with the tumor diameter measured during pathological examination.
Conclusion Assessment by MDCT showed that ILC tends to be diffuse, tumor enhancement tends to be very weak, and the rate of enhancement tends to be low. In addition, MDCT was found to be useful for determining the extent of carcinoma, and the diagnostic accuracy of MDCT, especially in determining the extent of carcinoma after NAC, was much higher than that of ultrasound or mammography.

DOI： 10.1007/s12282-008-0044-1

Comparison among different classification systems regarding the pathological response of preoperative chemotherapy in relation to the long-term outcome 査読

Tadahiko Shien, Chikako Shimizu, Kunihiko Seki, Taro Shibata, Takashi Hojo, Masashi Ando, Tsutomu Kohno, Noriyuki Katsumata, Sadako Akashi-Tanaka, Takayuki Kinoshita, Yasuhiro Fujiwara

BREAST CANCER RESEARCH AND TREATMENT 113 ( 2 ) 307 - 313 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Neoadjuvant chemotherapy (NAC) is increasingly used for operable disease. However there are several pathological response classification systems and the correlation between the pathological response to NAC according to each system and the patient outcome is still under debate. From 1998 to 2006, 370 primary breast cancer patients underwent curative surgical treatment after NAC containing both anthracycline and taxane at the National Cancer Center Hospital. We retrospectively evaluated the clinical and pathological response using the cTMN, Fisher's, Chevailler's, and the Japanese Breast Cancer Society classification systems (JBCS) respectively, and analyzed the correlation between each pathological response and disease free survival (DFS). Ninety-five (26%) patients had tumor recurrence. The five-year DFS according to Fisher's system was pCR, 80% and pINV, 63%. The five-year DFS according to Chevallier's system was Grade 1, 83%, Grade 2, 85%, Grade 3, 62%, and Grade 4, 65%. The five-year DFS according to the JBSC system was Grade 3, 77%, Grade 2, 68%, Grade 1a, 68%, Grade 1b, 58%, and Grade 0, 52%. None of the pathological response systems reached a statistically significant difference. In the classification by the post-treatment number of metastatic axillary lymph nodes, the 5-year DFS was n = 0, 86%; n = 1-3, 64%; n = 4-9, 44%; and n > 10 positive: 25% (P < .0001). In pathologically node negative patients, there were no significant differences in the DFS among all the classification systems. All three classifications analyzed were considered inadequate as the prognostic marker of the long-term outcome after NAC and further studies are warranted to optimize the prediction.

DOI： 10.1007/s10549-008-9935-2

Clinical and pathological features of intracystic papillary carcinoma of the breast 査読

Tomonori Akagi, Takayuki Kinoshita, Tadahiko Shien, Takashi Hojo, Sadako Akashi-Tanaka, Yusuke Murata

SURGERY TODAY 39 ( 1 ) 5 - 8 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

To evaluate the clinicopathological features of intracystic papillary carcinoma (ICPC), which have not been established given its rarity and lack of standard diagnostic criteria.
We reviewed the clinicopathological findings and treatment outcomes of 14 patients with ICPC diagnosed between 2002 and 2006.
Intracystic papillary carcinoma was diagnosed by fine-needle aspiration biopsy in three patients and by core-needle biopsy in six patients. A preoperative diagnosis was not made in five patients. Three patients underwent magnetic resonance imaging preoperatively, which helped to differentiate benign tumors and maintain free surgical margins. The final pathological diagnosis was invasive carcinoma in 2 (14.2%) of the 14 patients. The patients were followed up for 1-72 months, during which time only one died, of a cancer-unrelated cause.
Our results show that ICPC is more difficult to diagnose than common breast cancer preoperatively. Excisional biopsy was necessary when fine-needle aspiration and core-needle biopsy could not provide a diagnosis. Magnetic resonance imaging is helpful to differentiate a benign tumor from invasive disease.

DOI： 10.1007/s00595-008-3792-9

Clinicopathological Features of Tumors as Predictors of the Efficacy of Primary Neoadjuvant Chemotherapy for Operable Breast Cancer 査読

Tadahiko Shien, Sadako Akashi-Tanaka, Kunihisa Miyakawa, Takashi Hojo, Chikako Shimizu, Kunihiko Seki, Masashi Ando, Tsutomu Kohno, Naruto Taira, Hiroyoshi Doihara, Noriyuki Katsumata, Yasuhiro Fujiwara, Takayuki Kinoshita

WORLD JOURNAL OF SURGERY 33 ( 1 ) 44 - 53 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Neoadjuvant chemotherapy (NC) is standard therapy for patients with locally advanced breast cancer and is increasingly used for early-stage operable disease. Clinical and pathological responses are important prognostic parameters for NC, which aims to achieve a pathological complete response or tumor reduction to reduce the volume of subsequent breast resection. Clinicopathological markers that predict patient response to NC are needed to individualize treatment.
From 1998 to 2006, 368 patients with primary breast cancer underwent curative surgical treatment after NC (anthracycline and/or taxane without trastuzumab). We retrospectively evaluated the clinicopathological features and classification of the tumors using computed tomography (CT) before NC and analyzed the correlation with the pathological complete response (pCR) and reduction of tumor size after treatment.
The overall response and pCR rates in these patients were 86% and 17%, respectively. In multivariate analysis, classification as a scirrhous-type tumor was an independent predictor of reduced likelihood of pCR (p = 0.0115; odds ratio 0.21). For tumor reduction, histological grade 3 (p = 0.0002; odds ratio 3.3) and localized tumors identified by using CT imaging (p = 0.0126; odds ratio 2.4) were independent predictors in multivariate analysis.
In this study, NC often did not result in pCR for breast cancers classified as scirrhous. Furthermore, tumor type classification using CT imaging and histological grading was effective to predict tumor reduction in response to NC that included an anthracycline and/or a taxane.

DOI： 10.1007/s00268-008-9800-9

Evaluation of axillary status in patients with breast cancer using thin-section CT 査読

Tadahiko Shien, Sadako Akashi-Tanaka, Miwa Yoshida, Takashi Hojo, Eriko Iwamoto, Kunihisa Miyakawa, Takayuki Kinoshita

INTERNATIONAL JOURNAL OF CLINICAL ONCOLOGY 13 ( 4 ) 314 - 319 2008年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER TOKYO

Background. In recent years, the surgical management of patients with breast cancer has shifted to a locoregional approach, and evaluating the patient's axillary lymph node status is of the greatest importance in determining the appropriate treatment strategy. We evaluated on the efficacy of preoperative axillary staging using contrast-enhanced computed tomography (CE-CT).
Methods. Between 2000 and 2003, 235 patients with operable breast cancer who underwent CE-CT before surgery and 137 patients who received neoadjuvant chemotherapy (NAC) and underwent CE-CT before NAC and surgery were enrolled in this study. The axillary status was evaluated based on three criteria (short-axis diameter, shape, and enhancement type), and the diagnosis was correlated with the histopathological results.
Results. In patients who did not receive NAC, the size criterion of a short-axis diameter of more than 5 mm provided a sensitivity of 78%, a specificity of 75%, and an accuracy of 76% in predicting node-positive status. According to the size criterion of a short-axis diameter of more than 5 mm and the shape criterion of the absence of intranodal fat density, the specificity and accuracy were 90% and 81%, respectively, and according to the enhancement type criterion of early enhancement, the corresponding values were 89% and 78%. Evaluation was more difficult in patients who received NAC and the sensitivity of the size-based criterion in the patients who received NAC was lower than in those who did not.
Conclusion. These findings suggest that CE-CT based on size criteria is useful for evaluating the preoperative axillary status of breast cancer patients, but that evaluation is more difficult and the sensitivity is reduced in patients who have received NAC.

DOI： 10.1007/s10147-007-0753-z

Clinical efficacy of S-1 in pretreated metastatic breast cancer patients 査読

Tadahiko Shien, Chikako Shimizu, Sadako Akashi-Tanaka, Kan Yonemori, Tsutomu Kohno, Takashi Hojo, Masashi Ando, Noriyuki Katsumata, Takayuki Kinoshita, Yasuhiro Fujiwara

JAPANESE JOURNAL OF CLINICAL ONCOLOGY 38 ( 3 ) 172 - 175 2008年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OXFORD UNIV PRESS

Background: S-1, an oral fluoropyrimidine carbamate, is an active and well-tolerated agent against solid cancer. However, the clinical efficacy of S-1 in patients with metastatic breast cancer has not been determined.
Methods: We retrospectively evaluated the efficacy of S-1 and identified its adverse effects in patients with metastatic breast cancer who had failed to respond to prior chemotherapy regimens. All the patients were treated at the National Cancer Center Hospital and received S-1 twice daily at a dose of 80 mg/m(2) for 4 weeks, followed by a 2-week rest interval.
Results: Between 2003 and 2007, 37 women with metastatic breast cancer received S-1 as a third line or greater chemotherapy regimen. All the patients had been previously treated with both anthracyclines and taxanes prior to S-1 chemotherapy. The median order of S-1 administration was as a fifth-line treatment, and 23 patients (62%) received S-1 as their final anticancer drug. One (3%) partial response and two (5%) stable diseases were observed. The median time to progression (TTP) was 84 days. Grade 2 adverse events, such as diarrhea, stomatitis and neutropenia occurred in 5 (16%), 1 (3%) and 1 (3%) patients, respectively.
Conclusions: S-1 was safety administered to heavily treated metastatic breast cancer patients with limited efficacy. Further evaluation of S-1 is necessary to elucidate its clinical role in breast cancer treatment.

DOI： 10.1093/jjco/hyn001

Favorable outcome in patients with breast cancer in the presence of pathological response after neoadjuvant endocrine therapy 査読

Sadako Akashi-Tanaka, Mutsuko Omatsu, Chikako Shimizu, Masashi Ando, Kotoe Terada, Tadahiko Shien, Takayuki Kinoshita, Yasuhiro Fujiwara, Kunihiko Seki, Tadashi Hasegawa, Takashi Fukutomi

BREAST 16 ( 5 ) 482 - 488 2007年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CHURCHILL LIVINGSTONE

Neoadjuvant endocrine therapy (NAET) can expand the number of breast cancer patients who can be treated with breast-conserving surgery and can predict benefit from adjuvant endocrine therapy. Because no validated surrogate markers for long-term outcome have been established, we conducted prospective trials to evaluate pathological response and Ki-67 index following treatment with tamoxifen or anastrozole. The study population included postmenopausal women with operable breast tumors that were both estrogen and progesterone receptor-positive and larger than 3 cm. Response was classified as pathological response (minimal response or better) and non-response. Non-responding (25.5%, vs. response 85.9%, p = 0.002), axillary node-positive (58.4% vs. node negative 100%, p=0.045), and high pretreatment Ki-67 index (41.4% vs. low Ki-67 87.1%, p=0.03) patients were significantly associated with poor 5-year relapse-free survival. Multivariate analysis of relapse-free survival indicated that pathological response was independent. Therefore, pathological response may be a favorable prognostic factor after NAET. (c) 2007 Elsevier Ltd. Alt rights reserved.

DOI： 10.1016/j.breast.2007.02.003

[Diagnosis using contrast-enhanced CT for breast cancer and pathological diagnosis]. 査読

Sakemura N, Akashi-Tanaka S, Shien T, Kinoshita T, Iwamoto E, Miyakawa K

Nihon rinsho. Japanese journal of clinical medicine 65 Suppl 6 348 - 352 2007年6月

Tumor inhibitory effect of gefitinib (ZD1839, Iressa) and taxane combination therapy in EGFR-overexpressing breast cancer cell lines (MCMADR, MDA-MB-231) 査読

Daisuke Takabatake, Takeo Fujita, Tadahiko Shien, Kensuke Kawasaki, Naruto Taira, Seiji Yoshitomi, Hirotoshi Takahashi, Yoichi Ishibe, Yutaka Ogasawara, Hiroyoshi Doihara

INTERNATIONAL JOURNAL OF CANCER 120 ( 1 ) 181 - 188 2007年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-LISS

Some kinds of breast cancer cell lines, similar to several types of solid tumors, express epidermal growth factor receptor (EGFR). However, gefitinib, an EGFR tyrosine kinase inhibitor, is not effective for all these cell lines. Similarly, taxane is effective for many of the cell lines, although some, such as the multidrug-resistant MCF7/ADR cell line, show taxane-resistance. Here, we examined the growth inhibitory effect of combination treatment with gefitinib and taxane on the breast cancer cell lines MDA-MB-231 (EGFR-positive) and MCF7/ADR (EGFR- and HER2-positive). To estimate the combined effect, a Combination Index was calculated for each cell line. The combination of gefitinib and taxane showed a strong synergistic effect on MCF7/ADR cells, but an in vitro additive-antagonistic effect on MDA-MB-231 cells. Similarly, the combination treatment showed a significantly increased tumor inhibitory effect on MCF7/ADR xenografts, but not on MDA-MB-231 xenografts. Regarding the mechanism of the synergistic effect, Western blotting analysis revealed that taxane activated the EGFR-Akt pathway in MCF7/ADR cells but not in MDA-MB-231. To determine the optimal sequential administration of gefitinib and taxane for MCF7/ADR cells, we used flow cytometry to analyze the cell cycle and apoptosis; finding that taxane treatment followed by gefitinib produced a higher rate of G2 arrest and apoptosis than gefitinib treatment followed by taxane. These results suggest gefitinib overcomes the drug-resistance of these cells, thereby increasing the effects of taxane on MCF7/ADR cells. Further, activation of the EGFR-Akt pathway by taxane is related to this synergistic effect. (c) 2006 Wiley-Liss, Inc.

DOI： 10.1002/ijc.22187

Brain metastases after achieving local pathological complete responses with neoadjuvant chemotherapy. 査読

Tsukamoto S, Akashi-Tanaka S, Shien T, Terada K, Kinoshita T

Breast cancer (Tokyo, Japan) 14 ( 4 ) 420 - 424 2007年

記述言語：英語出版者・発行元：The Japanese Breast Cancer Society

Background: We encountered two patients with inflammatory breast carcinoma who developed symptomatic brain metastases after achieving local pathological complete responses (pCR) with neoadjuvant chemotherapy (NAC).<BR>Case presentations: The first patient is a 39-year-old woman (Case 1), who underwent NAC with AC (doxorubicin + cyclophosphamide)followed by weekly paclitaxel. After achieving a clinical CR (cCR), we conducted a modified radical mastectomy. Pathological evaluation confirmed no residual malignant cells within the breast tissue or lymph nodes. However, she developed neurological symptoms from brain metastases one month postoperatively. The second patient is a 44-year-old woman (Case 2). Again, no residual malignant cells were detected within the breast tissue or lymph nodes following NAC, but the patient developed symptomatic brain metastases eight months postoperatively. When primary breast tumors are locally advanced, it may be worthwhile to rule out brain metastases even if pCR is obtained after NAC.

DOI： 10.2325/jbcs.14.420

その他リンク： http://search.jamas.or.jp/link/ui/2008154599

乳房Paget's病の特徴と治療方針

久野博文, 木下貴之, 明石定子, 寺田琴江, 枝園忠彦, 岩本恵理子

日本臨床外科学会雑誌 67 ( 増刊 ) 593 - 593 2006年10月

Development of a Japanese version of the BREAST-Q and the traditional psychometric test of the mastectomy module for the assessment of HRQOL and patient satisfaction following breast surgery.

Saiga M, Taira N, Kimata Y, Watanabe S, Mukai Y, Shimozuma K, Mizoo T, Nogami T, Iwamoto T, Motoki T, Shien T, Matsuoka J, Doihara H

Breast Cancer EPub 2006年5月

Gefitinib, an epidermal growth factor receptor blockade agent, shows additional or synergistic effects on the radiosensitivity of esophageal cancer cells in vitro 査読

N Taira, H Doihara, T Oota, F Hara, T Shien, H Takahashi, S Yoshitomi, Y Ishibe, N Shimizu

ACTA MEDICA OKAYAMA 60 ( 1 ) 25 - 34 2006年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OKAYAMA UNIV MED SCHOOL

Human esophageal cancers have been shown to express high levels of epidermal growth factor receptor (EGFR) and a relationship between high EGFR expression and local advance, the number of lymph node metastases, life expectancy, and sensitivity to chemo-radiotherapy has been demonstrated. We examined the use of gefitinib, an orally active EGFR-selective tyrosine kinase inhibitor, as a new strategy for treatment of esophageal carcinoma. The effects of gefitinib were evaluated in monotherapy and in combination with radiotherapy in human esophageal carcinoma cell lines. Gefitinib produced a dose-dependent inhibition of cellular proliferation in all of the 8 esophageal carcinoma cell lines examined, with IC50 values ranging from 5.7 mu M to 36.9 mu M. In combination, gelitinib and radiotherapy showed a synergistic effect in 2 human esophageal carcinoma cell lines and an additive effect in 5 cell lines. Western blotting demonstrated that gefitinib blocked activation of the EGFR-extracellular signal-regulated kinase (Erk) pathway and the EGFR-phosphoinositide-3 kinase (PI3K)-Akt pathway after irradiation. These results suggest that further evaluation of EGFR blockade as a treatment for esophageal cancer should be performed, and that radiotherapy combined with EGFR blockade may enhance the response of esophageal carcinoma to therapy.

DOI： 10.18926/AMO/30755

Frequent overexpression of epidermal growth factor receptor (EGFR) in mammary high grade ductal carcinomas with myoepithelial differentiation 査読

T Shien, T Tashiro, M Omatsu, T Masuda, K Furuta, N Sato, S Akashi-Tanaka, M Uehara, E Iwamoto, T Kinoshita, T Fukutomi, H Tsuda, T Hasegawa

JOURNAL OF CLINICAL PATHOLOGY 58 ( 12 ) 1299 - 1304 2005年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：B M J PUBLISHING GROUP

Aims: To evaluate the expression of common biological markers and the epidermal growth factor receptor (EGFR) in mammary high grade ductal carcinomas with myoepithelial differentiation (DCMDs).
Materials/methods: Thirty DCMDs were clinicopathologically and immunohistochemically analysed and compared with 36 control cases of high grade conventional invasive ductal carcinoma (IDC).
Results: EGFR, HER2/neu, oestrogen receptor, progesterone receptor, and p53 expression was seen in 21, one, three, four, and 20 of the 30 DCMDs, compared with eight, nine, 18, 17, and five of the 36 conventional IDCs (p < 0.05), respectively. In 16 of the 30 DCMDs, metastases were found in the brain, lung, bone, and liver, within a maximum of 47 months (mean, 13.9) after initial surgery, whereas only four of the 36 conventional IDCs metastasised to the lung and bone within a maximum of 27 months (mean, 18.0) after initial surgery (p = 0.0001). There was a significant difference in disease free survival between DCMD and conventional IDC (p = 0.001). EGFR was frequently overexpressed in DCMD compared with conventional IDC, whereas the expression of HER2/neu and hormone receptors was lower in DCMD. Fluorescent in situ hybridisation revealed that the mean EGFR to chromosome 7 centromere (CEP7) ratio of the 24 DCMD cases available for evaluation was 1.03, and EGFR gene amplification was not detected in the 21 DCMD cases with EGFR overexpression.
Conclusion: Immunohistochemistry for myoepithelial markers and EGFR is useful for the accurate diagnosis and molecular target treatment of high grade DCMD.

DOI： 10.1136/jcp.2005.026096

Diagnosis of complete response to neoadjuvant chemotherapy using diagnostic Imaging in primary breast cancer patients 査読

T Kanazawa, S Akashi-Tanaka, E Iwamoto, M Takasugi, T Shien, T Kinoshita, K Miyakawa, C Shimizu, M Ando, N Katsumata, Y Fujiwara, T Fukutomi

BREAST JOURNAL 11 ( 5 ) 311 - 316 2005年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：BLACKWELL PUBLISHING

Advances in the therapeutic agents used for neoadjuvant chemotherapy (NAC) have recently achieved higher response rates and induced a greater number of pathologic complete responses (pCR) than ever before. The aim of this study is the diagnosis of pCR after NAC by diagnostic imaging of clinical complete response (cCR) patients. This study included 35 breast cancer patients who demonstrated cCR after receiving NAC with a combination of anthracycline and taxane from May 1998 to August 2003. Surgical treatment included breast-conserving therapy followed by radiotherapy or mastectomy. The identity of post-NAC lesions as either a complete response (CR) or partial response (PR) were made by mammography, ultrasonography, and contrast-enhanced computed tomography (CT). Among the 35 patients, 11 achieved pCR, including the disappearance of both invasive and intraductal components. Of the patients achieving pCR, eight were defined as CR and three were determined to be PR by CT There was a significant relationship between the pCR and the determination of CR by CT The determination of CR by ultrasonography was indicative of the disappearance of pathologic invasive components. While mammography appeared to reflect the observed histologic results, we did not observe any statistical differences. A subset of cases exhibited discrepancies between the imaging and pathologic results, likely due to the replacement of destroyed tumor cells by fibrosis and granulomatous tissue. The evaluation of CR by CT was significantly indicative of pCR. The positive predictive value, however, was not large enough to avoid surgical treatment. Further studies will be needed to establish a diagnosis of pCR.

DOI： 10.1111/j.1075-122X.2005.00003.x

Antitumor effect of gefitinib ('Iressa') on esophageal squamous cell carcinoma cell lines in vitro and in vivo 査読

F Hara, M Aoe, H Doihara, N Taira, T Shien, H Takahashi, S Yoshitomi, K Tsukuda, S Toyooka, T Ohta, N Shimizu

CANCER LETTERS 226 ( 1 ) 37 - 47 2005年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER IRELAND LTD

High expression of epidermal growth factor receptor (EGFR) is thought to be correlated with cell proliferation, invasion, metastasis, resistance to chemoradiotherapy, and poor prognosis in Various kinds of human cancers. Blockade of EGFR signal transduction can be a promising strategy for cancer therapy. Approximately 40-70% of esophageal squamous cell carcinomas (ESCCs) show high expression of EGFR. In this study, we examined the antitumor effect of gefitinib, an EGFR tyrosine kinase inhibitor, against ESCC cells in vitro and in vivo. In three ESCC cell lines (TE8, T.T and T.Tn), cell proliferation had been inhibited in a dose-dependent manner and IC(50) Values (respectively, 8.49, 18.9 and 17.3 mu M). Gefitinib inhibited EGF-induced autophosphorylation of EGFR and its downstream signaling pathways, Ras/Raf/MAPK and PI3K/Akt, and caused G(1) arrest of cell cycle and apoptosis confirmed with flow cytometry. We examined the effect of gefitinib on nude mice bearing established TE8 and T.T xenografts. Gefitimb (100 or 200 mg/kg once-daily, p.o.) showed antitumor activity in a dose-dependent manner, resulting in a significantly improved survival of treated mice as compared with untreated mice. Immunohistochemical examination of the harvested tumor was performed to examine the status of phosphorylated EGFR, PCNA, Factor VIII and apoptosis. We found inhibition of EGFR phosphorylation, cell cycle arrest (by PCNA staining), decrease of microvessel density (Factor VIII) and induction of apoptosis by TUNEL staining. In conclusion, our findings demonstrate that gefitinib is effective for growth inhibition of ESCC cell lines in vitro and in vivo and suggest that gefitinib may be one of the new therapeutic options for ESSC. (c) 2005 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/j.canlet.2004.12.025

PLC and PI3K pathways are important in the inhibition of EGF-induced cell migration by gefitinib ('Iressa', ZD1839) 査読

Tadahiko Shien, Hiroyoshi Doihara, Humikata Hara, Hirotoshi Takahashi, Seiji Yoshitomi, Naruto Taira, Youiti Ishibe, Jyun Teramoto, Motoi Aoe, Nobuyoshi Shimizu

Breast Cancer 11 ( 4 ) 367 - 373 2004年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

Background: Expression of epidermal growth factor receptor (EGFR) by human breast cancer tissues is associated with poor clinical response. The EGFR tyrosine kinase inhibitor (EGFR-TKI), gefitinib ('Iressa', ZD1839), is a leading example of a molecular targeted agent, and has an anti-proliferative effect on various cancer cells. But the details of the anti-cancer effect and mechanism have not been elucidated. We studied the anti-cancer effect of gefitinib in breast cancer cell lines and the intracellular pathway downstream of EGFR associated with cell migration. Methods: In this study, we analysed the anti-proliferative and anti-migratory effect of gefitinib in EGFR (+) breast cancer cell lines by WST-1 analysis and chemotaxis chamber analysis. We analyzed several intracellular phosphorylated pathways which are activated by mitogen activated kinases (extracellular signal-regulated protein kinase 1 and 2: MEK), phosphatidylinositol 3'-kinase (PI3K) and phpspholipase C (PLC), by blocking those pathways using inhibitors of each kinase, and also investigated the effects on the phosphorylation of myosin light chain (MLC). Results: Gefitinib inhibited proliferation in most of these cell lines. MDA-MB231 was shown to be resistant. Furthermore, proliferation of MDA-MB231 cells was not affected by EGF stimulation, but migration of MDA-MB231 cells was significantly inhibited. PI3K and PLC inhibitors blocked EGF-stimulated cell migration and MLC phosphorylation, but the MEK inhibitor did not influence cell migration. Conclusions: Gefitinib has an anti-migratory effect on MDA-MB231 that results in an anti-proliferative effect. PI3K and PLC are important for the migration of MDA-MB231 cells, and gefitinib may inhibit migration by blocking these signalling pathways.

DOI： 10.1007/BF02968044

Less invasive surgery for primary hyperparathyroidism based on preoperative Tc-99m-hexakis-2-methoxyisobutylisonitrile imaging findings 査読

N Taira, H Doihara, F Hara, T Shien, D Takabatake, H Takahashi, S Yoshitomi, Y Ishibe, N Shimizu

SURGERY TODAY 34 ( 3 ) 197 - 203 2004年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER-VERLAG

Purpose. The clinical benefits acquired by introducing hexakis-2-methoxyisobutylisonitrile (MIBI), the reliability of MIBI, and the adequacy of applying less invasive surgeries based on MIBI imaging were retrospectively investigated.
Methods. The surgical results before introducing Tc-99m-MIBI scintigraphy (MIBI) in 10 patients with primary hyperparathyroidism were compared with those after introducing MIBI in 22 patients.
Results. Surgical failure occurred in two patients (20.0%) before introducing MIBI, and in one (4.5%) after introducing MIBI, thus suggesting that the surgical results improved after introducing MIBI. This was because the diagnosis of ectopic adenoma improved with MIBI. Less invasive surgeries were performed in two patients before introducing MIBI, and in 13 patients after introducing MIBI. Consequently, the operation time decreased significantly. The sensitivity of MIBI,. ultrasonography, and computed tomography to adenoma was 100%, 72.2%, and 57.1%, respectively, thus indicating MIBI to have the highest sensitivity. The positive predictive value of MIBI was 85.7%, and all false-positive results were caused by nodular lesions of the thyroid gland. However, the preoperative differentiation of false-positive results could be successfully performed by combining MIBI with neck ultrasonography.
Conclusion. The sensitivity of MIBI to adenoma was thus found to be highly satisfactory. As a result, it might be possible to perform less invasive surgeries based on MIBI imaging without any decrease in the surgical results.

DOI： 10.1007/s00595-003-2687-z

進行・再発乳癌に対するTXT単独及び併用療法の検討

土井原博義, 吉冨誠二, 枝園忠彦, 原文堅, 高畠大典, 高橋寛敏, 平成人, 石部洋一, 清水信義

日本癌治療学会誌 38 ( 2 ) 594 - 594 2003年9月

食道癌細胞株に対するgefitinibと化学療法剤の併用効果に関する検討

平成人, 土井原博義, 太田徹哉, 原文堅, 枝園忠彦, 高橋寛敏, 吉富誠二, 石部洋一, 小笠原豊, 青江基, 清水信義

日本癌治療学会誌 38 ( 2 ) 610 - 610 2003年9月

内分泌療法にビスホスホネート併用が有用であった乳癌骨転移の2例

吉富誠二, 土井原博義, 枝園忠彦, 原文堅, 平成人, 高橋寛敏, 石部洋一, 小笠原豊, 清水信義

日本癌治療学会誌 38 ( 2 ) 683 - 683 2003年9月

乳癌に対するハーセプチン,ビノレルビン併用療法の検討

高橋寛敏, 平成人, 土井原博義, 原文堅, 枝園忠彦, 吉富誠二, 石部洋一, 小笠原豊, 清水信義

日本癌治療学会誌 38 ( 2 ) 685 - 685 2003年9月

悪性中皮腫に対するin vitro及びin vivoのGefitinib(Iressa)の抗腫瘍効果(Antitumor effect by Gefitinib(Iressa)against malignant mesothelioma in vitro and in vivo)

原文堅, 青江基, 豊岡伸一, 平成人, 枝園忠彦, 高畠大典, 吉冨誠二, 高橋寛敏, 石部洋一, 小笠原豊, 土井原博義, 清水信義

日本癌治療学会誌 38 ( 2 ) 767 - 767 2003年9月

原発性乳癌におけるepidermal growth factor receptor(EGFR)の発現と予後の検討ホルモンレセプターとの相関を中心に

土井原博義, 平成人, 吉富誠二, 枝園忠彦, 原文堅, 高橋寛敏, 石部洋一, 清水信義, 高嶋成光

乳癌の臨床 18 ( 3 ) 254 - 259 2003年6月

記述言語：日本語出版者・発行元：(株)篠原出版新社

原発性乳癌手術症例309例を対象に,Epidermal Growth Factor Receptor(EGFRの発現とホルモンレセプター,予後の関連について比較検討した.その結果,平均観察期間74.6ヵ月で,EGFR(+)を認めた症例は121例(39.2%)であった.EGFR(+)群は閉経前症例,Stage進行例が有意に多かった.EGFRはホルモンレセプターの発現と有意な逆相関を示し,EGFR(+)ER(-)群は有意に5年健存,生存率が不良で,EGFR(-)PgR(+)群では有意に予後良好であった.なお,補助療法とEGRFの発現からみた生存曲線では,内分泌療法,化学療法ともEGRF(+)と(-)群の間の生存率に有意差はみられなかった.以上より,EGFRは予後予測因子の指標として重要であると思われた

乳癌の左眼脈絡膜転移の1例

枝園忠彦, 土井原博義, 平成人, 清水信義

日本臨床外科学会雑誌 = The journal of the Japan Surgical Association 64 ( 5 ) 1082 - 1085 2003年5月

記述言語：日本語出版者・発行元：日本臨床外科学会

臨床的に稀な乳癌の脈絡膜転移症例を経験した.症例は56歳の女性.平成8年近医にて左乳癌に対し乳房温存療法が行われ, 1年後に頸部リンパ節転移, 2年後に局所再発が認められたため化学療法が行われた.さらに平成13年6月多発性肝転移が明らかとなり再度化学療法が行われていたが,同年9月ころより左霧視を自覚し始めたため再度当院紹介となった.左視神経乳頭が軽度腫脹し周囲に漿液性網膜剥離を認めた.超音波上脈絡膜の肥厚を,頭部CT上左眼球後面に径1.3cmの扁平な腫瘍陰影を認め,乳癌の脈絡膜転移の診断となった.患者のQOLを良好に保つために放射線治療の適応も考えられたが,患者が拒否したためそれ以上の治療は行われなかった.乳癌治療の進歩による生存期間の延長により今後脈絡膜転移の発見が増加すると考えられた.

DOI： 10.3919/jjsa.64.1082

乳癌株MDA-MB-231に対する上皮性増殖因子受容体阻害剤(ZD1839;Iressa)のmigration抑制効果及び細胞内リン酸化経路の検討

枝園忠彦, 平成人, 高橋寛敏, 吉冨誠二, 石部洋一, 青江基, 土井原博義, 清水信義

日本癌治療学会誌 37 ( 2 ) 510 - 510 2002年9月

食道癌細胞株に対するZD-1839(Iressa)と放射線の併用効果の検討

平成人, 太田徹哉, 土井原博義, 枝園忠彦, 高橋寛敏, 吉富誠二, 石部洋一, 寺本淳, 青江基, 清水信義

日本癌治療学会誌 37 ( 2 ) 388 - 388 2002年9月

眼球摘出後25年を経て孤立性肺転移を来たした脈絡膜悪性黒色腫の1切除例

枝園忠彦, 前田宏也, 高尾智也, 山本寛斉, 宇高徹総, 大屋崇

日本呼吸器外科学会雑誌 = The journal of the Japanese Association for Chest Surgery 16 ( 5 ) 635 - 639 2002年7月

記述言語：日本語出版者・発行元：特定非営利活動法人日本呼吸器外科学会

悪性黒色腫は皮膚, リンパ節, 肺, 肝などに転移するため予後不良の疾患とされ, また遅発性の転移を認めることも報告されている.<BR>今回我々は, 眼球摘出後25年を経過して肺転移を来たした脈絡膜悪性黒色腫の症例を経験したので報告する.症例は65歳男性で, 1975年に脈絡膜悪性黒色腫にて右眼球摘出術をうけた.2000年9月, 検診にて左下肺野に異常陰影を指摘され当院受診となった.胸部CTにて左上葉舌区 (S⁵) に孤立性の腫瘍陰影を認め, CTガイド下に行った経皮的穿刺吸引細胞診の結果, 悪性黒色腫の診断に至った.これに対し左上葉切除術を施行した.病理組織検査にて葉気管支間リンパ節および葉気管支周囲リンパ節に転移を認めた.術後8ヶ月の現在再発を認めていない.悪性黒色腫の既往を持つ患者に対しては, 転移を念頭においた長期の経過観察が必要であり, 転移を早期に発見し積極的治療を行うことが有用であると感じた.

DOI： 10.2995/jacsurg.16.5_635

その他リンク： http://search.jamas.or.jp/link/ui/2002279280

絞扼性イレウスを発症したS状結腸間膜内ヘルニアの1例

奥谷大介, 枝園忠彦, 宗淳一, 宇高徹総

日本臨床外科学会雑誌 62 ( 3 ) 817 - 820 2001年3月

記述言語：日本語出版者・発行元：日本臨床外科学会

80歳男.腹痛,嘔吐を主訴とした.受診時,腹部全体に圧痛を認めたが,腹膜刺激症状はなかった.腹部X線,CTでニボー,腹水を認め,イレウスと診断した.イレウス管留置による保存的治療を行ったが,症状の改善を認めず,発症後4日目に手術を施行した.開腹すると,S状結腸間膜右葉に10cmに異常裂孔を開口部とするヘルニア嚢を認めた.そのヘルニア内容物はTreitz靱帯から10cmの部位より160cmの小腸であり,それに続く肛門側の小腸が捻転して壊死に陥っていた.壊死腸管は70cmであり,壊死腸管を含む120cmの小腸切除と裂孔部の閉鎖を行って手術を終了し,術後22日目に退院となった.S状結腸間膜内ヘルニアとして,本例は本邦13例目であった.腹部外傷や開腹手術の既往歴がなく,イレウスで発症した症例では,内ヘルニアによる絞扼性イレウスを念頭に置き,早期診断と治療を考慮すべきである

その他リンク： https://search.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2001&ichushi_jid=J03156&link_issn=&doc_id=20010410180044&doc_link_id=10.3919%2Fjjsa.62.3_817&url=https%3A%2F%2Fdoi.org%2F10.3919%2Fjjsa.62.3_817&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

胸骨下部切開による大動脈弁置換手術における手術体位の工夫

曽我部長徳, 大屋崇, 白川和豊, 水田稔, 前田宏也, 宇高徹総, 宗淳一, 奥谷大介, 枝園忠彦

The Japanese Journal of THORACIC AND CARDIOVASCULAR SURGERY 49 ( Suppl. ) 116 - 116 2001年3月

腹腔内大量出血をきたした脾動脈瘤破裂の1例

宇高徹総, 枝園忠彦, 奥谷大介, 宗淳一, 曽我部長徳, 前田宏也, 水田稔, 白川和豊, 大屋崇

外科 64 ( 1 ) 112 - 114 2001年1月

記述言語：日本語出版者・発行元：(株)南江堂

64歳男.上腹部痛を主訴とした.CT検査で脾動脈瘤を認めたため緊急手術を行った.術中所見から動脈瘤破裂と診断し,脾動脈を含む動脈瘤の近位で結紮・切離したあと,動脈瘤を含む膵尾部脾合併切除を施行した.術後,血清アミラーゼの軽度上昇を認めたが保存的に軽快し,術後28日目に退院となった

その他リンク： https://search.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2001&ichushi_jid=J00393&link_issn=&doc_id=20020131530019&doc_link_id=10.15106%2FJ00393.2002138239&url=https%3A%2F%2Fdoi.org%2F10.15106%2FJ00393.2002138239&type=%88%E3%8F%91.jp_%83I%81%5B%83%8B%83A%83N%83Z%83X&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00024_2.gif

胸骨下部切開術による大動脈弁置換術の検討

曽我部長徳, 大屋嵩, 宗淳一, 奥谷大介, 枝園忠彦

日本心臓血管外科学会雑誌 31 ( Suppl. ) 311 - 311 2001年1月

診断されずに急性腹症を繰り返した腸型ベーチェットの1例

枝園忠彦, 奥谷大介, 宗淳一, 宇高徹総, 水田稔, 白川和豊, 大屋崇

日本臨床外科学会雑誌 61 ( 増刊 ) 738 - 738 2000年10月

総胆管結石を合併した急性胆嚢炎症例の検討

宗淳一, 水田稔, 枝園忠彦, 奥谷大介, 宇高徹総, 白川和豊, 大屋崇

日本臨床外科学会雑誌 61 ( 増刊 ) 702 - 702 2000年10月

閉鎖孔ヘルニア6例の検討

宇高徹総, 枝園忠彦, 奥谷大介, 宗淳一, 曽我部長徳, 前田宏也, 水田稔, 白川和豊, 大屋崇

日本消化器外科学会雑誌 33 ( 7 ) 1047 - 1047 2000年7月

大腸穿孔例の臨床的検討大腸癌穿孔を中心に

奥谷大介, 枝園忠彦, 宗淳一, 宇高徹総, 曽我部長徳, 前田宏也, 水田稔, 白川和豊, 大屋崇

日本消化器外科学会雑誌 33 ( 7 ) 1357 - 1357 2000年7月

治療に難渋した特発性食道破裂の1例

奥谷大介, 宇高徹総, 枝園忠彦, 宗淳一, 曽我部長徳, 前田宏也, 水田稔, 白川和豊, 大屋崇, 池田宣聖

三豊総合病院雑誌 20 97 - 102 1999年12月

記述言語：日本語出版者・発行元：三豊総合病院

66歳男.特発性食道破裂術後の難治性瘻孔に対して治癒した1例.内視鏡下フィブリン糊注入やレーザー焼灼似て瘻孔が閉鎖しなかった症例でも胸腔ドレーンと栄養管理の継続によって瘻孔の閉塞が期待できる.特にcavityに対するCTガイド下胸腔ドレナージは極めて有用である

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