Faculty Profiles - IWAMURO Masaya

Papers - IWAMURO Masaya

Division display 301 - 320 of about 422 ／ All the affair displays >>

Adenocarcinoma In Situ Arising from Brunner's Gland Treated by Endoscopic Mucosal Resection. Reviewed International journal

Masaya Iwamuro, Sayo Kobayashi, Nobuya Ohara, Seiji Kawano, Yoshiro Kawahara, Hiroyuki Okada

Case reports in gastrointestinal medicine 2017 7916976 - 7916976 2017

Authorship：Lead author,　Corresponding author Language：English

An 86-year-old Japanese man was presented to our hospital for further investigation of duodenal adenocarcinoma. The tumor was endoscopically resected. Pathological analysis revealed coexistence of gastric foveolar metaplasia and a surrounding hyperplastic Brunner's gland, in addition to an adenocarcinoma component. Immunostaining for MUC5AC and MUC6 confirmed the diagnosis of adenocarcinoma in situ arising from Brunner's gland hyperplasia. This case suggests that although detailed preoperative evaluation is required to determine the depth of tumor invasion, endoscopic resection may be a promising option for the treatment of adenocarcinomas arising from Brunner's gland hyperplasia.

DOI： 10.1155/2017/7916976

PubMed

researchmap

Pseudomelanosis duodeni: A case report Reviewed

Masaya Iwamuro, Shohei Oka, Hiromitsu Kanzaki, Takehiro Tanaka, Seiji Kawano, Yoshiro Kawahara, Hiroyuki Okada

Journal of Japanese Society of Gastroenterology 114 ( 7 ) 1264 - 1268 2017

The Clinical and Hormonal Characteristics of Primary Adrenal Lymphomas: The Necessity of Early Detection of Adrenal Insufficiency Reviewed

Ko Harada, Kosuke Kimura, Masaya Iwamuro, Tomohiro Terasaka, Yoshihisa Hanayama, Eisei Kondo, Eiko Hayashi, Tadashi Yoshino, Fumio Otsuka

INTERNAL MEDICINE 56 ( 17 ) 2261 - 2269 2017

Paroxysmal Hypertension Induced by an Insulinoma Reviewed

Ko Harada, Yoshihisa Hanayama, Kou Hasegawa, Masaya Iwamuro, Hideharu Hagiya, Ryuichi Yoshida, Fumio Otsuka

INTERNAL MEDICINE 56 ( 4 ) 413 - 417 2017

Hepatic and Gastric Involvement in a Case of Systemic Sarcoidosis Presenting with Rupture of Esophageal Varices Reviewed

Hiroaki Saito, Masayasu Ohmori, Masaya Iwamuro, Takehiro Tanaka, Nozomu Wada, Tetsuya Yasunaka, Akinobu Takaki, Hiroyuki Okada

INTERNAL MEDICINE 56 ( 19 ) 2583 - 2588 2017

Safety and Efficacy of Small Bowel Examination by Capsule Endoscopy for Patients before Liver Transplantation Reviewed

Kawano Seiji, Takaki Akinobu, Iwamuro Masaya, Yasunaka Tetsuya, Kono Yoshiyasu, Miura Kou, Inokuchi Toshihiro, Kawahara Yoshiro, Umeda Yuzo, Yagi Takahito, Okada Hiroyuki

BIOMED RESEARCH INTERNATIONAL 2017 2017

Gastroduodenal Intussusception with a Gastric Gastrointestinal Stromal Tumor Treated by Endoscopic Submucosal Dissection Reviewed

Kenji Yamauchi, Masaya Iwamuro, Eiji Ishii, Makoto Narita, Nobuto Hirata, Hiroyuki Okada

INTERNAL MEDICINE 56 ( 12 ) 1515 - 1519 2017

Importance of Second-look Endoscopy on an Empty Stomach for Finding Gastric Bezoars in Patients with Gastric Ulcers Reviewed

Masaya Iwamuro, Shouichi Tanaka, Yuki Moritou, Tomoki Inaba, Reiji Higashi, Chiaki Kusumoto, Naoko Yunoki, Shin Ishikawa, Yuko Okamoto, Yoshinari Kawai, Ken-ichi Kitadal, Ryuta Takenaka, Tatsuya Toyokawa, Hiroyuki Okada

ACTA MEDICA OKAYAMA 71 ( 3 ) 241 - 247 2017

Diffuse Intestinal Ganglioneuromatosis Showing Multiple Large Bowel Ulcers in a Patient with Neurofibromatosis Type 1 Reviewed

Masaya Iwamuro, Rika Omote, Takehiro Tanaka, Naruhiko Sunada, Takahiro Nada, Yoshitaka Kondo, Soichiro Nose, Mitsuhiko Kawaguchi, Fumio Otsuka, Hiroyuki Okada

INTERNAL MEDICINE 56 ( 24 ) 3287 - 3291 2017

Clinical Characteristics of Seven Patients with Lanthanum Phosphate Deposition in the Stomach Reviewed

Naoko Murakami, Masao Yoshioka, Masaya Iwamuro, Junichirou Nasu, Soichiro Nose, Junji Shiode, Hiroyuki Okada, Kazuhide Yamamoto

INTERNAL MEDICINE 56 ( 16 ) 2089 - 2095 2017

Colonoscopy examination requires a longer time in patients with acromegaly than in other individuals Reviewed

Iwamuro Masaya, Yasuda Miho, Hasegawa Kou, Fujisawa Satoshi, Ogura-Ochi Kanako, Sugihara Yuusaku, Harada Keita, Hiraoka Sakiko, Okada Hiroyuki, Otsuka Fumio

Endocrine Journal 65 ( 2 ) 151 - 157 2017

Authorship：Lead author,　Corresponding author Language：English Publisher：The Japan Endocrine Society

<p>This study aimed to determine the prevalence of colorectal neoplasms and to investigate the rate of and time required for cecal intubation in patients with acromegaly. A database search performed at our institution identified 29 patients with acromegaly who underwent colonoscopy. Data regarding the endoscopic, biological, and pathological examinations performed were retrospectively reviewed from the clinical records. Subsequently, the rate of and time required for cecal intubation were investigated in 23 patients with acromegaly and compared with the corresponding data of the control group. Control subjects were selected from a 2:1 matched historical control cohort, according to baseline characteristics. The mean age of the acromegaly group (17 female and 12 male) was 60.4 ± 12.6 years. Twelve patients had adenoma (41.4%), eight patients had hyperplastic polyps (27.6%), three patients had sessile serrated adenoma/polyps (10.3%), and three patients had colon cancer (10.3%). Successful cecal intubation was achieved in all patients in both groups. The difference in the time required for successful intubation between the acromegaly group (15.7 ± 9.8 minutes) and the control group (8.7 ± 6.0 minutes) was statistically significant. Linear regression analysis revealed that increased patient age was significantly related to longer colonoscope insertion times. In conclusion, although cecal intubation during colonoscopy was successful in all participants, it required a longer time in patients with acromegaly. Our results underscore the importance of and certain technical difficulties involved in colonoscopy procedures in patients with acromegaly, especially in older patients.</p>

DOI： 10.1507/endocrj.EJ17-0322

PubMed

CiNii Article

researchmap

Intravascular lymphoma with a gastric submucosal tumor Reviewed

Hiroaki Sawahara, Masaya Iwamuro, Mamoru Ito, Soichiro Nose, Mamoru Nishimura, Hiroyuki Okada

Journal of Japanese Society of Gastroenterology 114 ( 8 ) 1446 - 1453 2017

Changes of colonic mucosa caused by long-term use and discontinuation of anthraquinone

Iwano Eiji, Iwamuro Masaya, Okada Hiroyuki

Okayama Igakkai Zasshi (Journal of Okayama Medical Association) 129 ( 1 ) 23 - 30 2017

Language：Japanese Publisher：Okayama Medical Association

Anthraquinone, an anthracene derivatives, is widely used as a purgative medicine. The long-term use of anthraquinone is known to cause melanosis coli and elevated lesions in the colon. However, the clinical course of patients who take anthraquinone over a long term and those who discontinue the drug has not been fully investigated. Here we investigated 22 patients who had colonic mucosal changes (i.e., melanosis coli and elevated lesions) who had been taking anthraquinone for at least one year and discontinued it. We classified the elevated lesions into two subtypes: the small-lesion, which included multiple small nodules that were < 2 mm in dia., and the large-lesion, which included a single or multiple nodules of ≥ 2-mm dia. We used colonoscopy to investigate the changes of colonic lesions between before and after the discontinuation of anthraquinone. The results indicated that the nodules of the small-lesion group were lymphoid follicle hyperplasia. In the large-lesion group, adenoma was most frequently observed (n＝118), followed by hyperplastic polyp (n＝52) and inflammatory changes with edema (n＝22). Melanosis coli and elevated lesions were decreased or invisible after the discontinuation of anthraquinone. Our findings thus suggest that the long-term use of anthraquinone may cause some type of elevated lesions due to chronic inflammation. It is recommended that the use of anthraquinone be limited to a short term.

DOI： 10.4044/joma.129.23

CiNii Article

CiNii Books

researchmap

Other Link： http://search.jamas.or.jp/link/ui/2017219747

経気管支肺生検で診断に至った血管内大細胞型B細胞リンパ腫の二例

清水和久, 木村耕介, 灘隆宏, 安藤明美, 長谷川功, 早稲田公一, 岩室雅也, 花山宜久, 近藤英生, 吉野正, 大塚文男

日本病院総合診療医学会雑誌 11 ( 2 ) 201 - 201 2016.12