Faculty Profiles - IWAMURO Masaya

Papers - IWAMURO Masaya

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Postoperative bleeding risk after gastric endoscopic submucosal dissection during antithrombotic drug therapy Reviewed

Yoshiyasu Kono, Yuka Obayashi, Yuki Baba, Hiroyuki Sakae, Tatsuhiro Gotoda, Ko Miura, Hiromitsu Kanzaki, Masaya Iwamuro, Seiji Kawano, Yoshiro Kawahara, Takehiro Tanaka, Hiroyuki Okada

Journal of Gastroenterology and Hepatology (Australia) 33 ( 2 ) 453 - 460 2018.2

Far East Scarlet-like Fever Masquerading as Adult-onset Kawasaki Disease.

Kazuki Ocho, Masaya Iwamuro, Kou Hasegawa, Hideharu Hagiya, Kammei Rai, Tetsuya Yumoto, Fumio Otsuka

Internal medicine (Tokyo, Japan) 57 ( 3 ) 437 - 440 2018.2

Language：English Publishing type：Research paper (scientific journal)

A previously healthy 31-year-old man was referred to us with refractory septic shock accompanied by bilateral conjunctival congestion and erythema of his right lower limb. Nine days after admission, he had bilateral desquamation of the fingertips, and his presentation satisfied the criteria for Kawasaki disease. A serological examination was positive for Yersinia pseudotuberculosis, and he was diagnosed with Far East scarlet-like fever (FESLF). Interestingly, his 11-month-old baby boy had similar symptoms around the same time, indicating the intrafamilial transmission of the pathogen. We should consider FESLF when we encounter a familial occurrence of systemic manifestations of Kawasaki disease.

DOI： 10.2169/internalmedicine.9250-17

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総合内科における高IgG4血症の臨床的特徴の解析

長谷川功, 花山宜久, 岩室雅也, 小比賀美香子, 近藤英生, 片岡仁美, 大塚文男

日本内科学会雑誌 107 ( Suppl. ) 184 - 184 2018.2

パテンシーカプセルが回腸に長期滞留したクローン病の1例

岩室雅也, 高嶋志保, 井口俊博, 高原政宏, 川野誠司, 平岡佐規子, 近藤喜太, 田中健大, 岡田裕之

日本消化器病学会雑誌 115 ( 2 ) 203 - 210 2018.2

Clinical outcome of patients with obscure gastrointestinal bleeding during antithrombotic drug therapy Reviewed

Yoshiyasu Kono, Seiji Kawano, Yuki Okamoto, Yuka Obayashi, Yuki Baba, Hiroyuki Sakae, Makoto Abe, Tatsuhiro Gotoda, Toshihiro Inokuchi, Hiromitsu Kanzaki, Masaya Iwamuro, Yoshiro Kawahara, Hiroyuki Okada

Therapeutic Advances in Gastroenterology 11 2018.1

Gastrointestinal follicular lymphoma: Current knowledge and future challenges. Invited Reviewed

Takata K, Miyata-Takata T, Sato Y, Iwamuro M, Okada H, Tari A, Yoshino T

Pathology International 68 ( 1 ) 1 - 6 2018.1

23価肺炎球菌莢膜ポリサッカライドワクチンの皮下注射によりショックを呈した1例

大村大輔, 頼冠名, 岸良匡, 岡浩介, 大重和樹, 灘隆宏, 岩室雅也, 小比賀美香子, 大塚文男

日本病院総合診療医学会雑誌 14 ( 1 ) 32 - 32 2018.1

Gastric MALT Lymphoma with Increased Plasma Cell Differentiation Showing Unique Endoscopic Features. Reviewed International journal

Masaya Iwamuro, Takehiro Tanaka, Kenji Nishida, Seiji Kawano, Yoshiro Kawahara, Shogen Ohya, Tadashi Yoshino, Hiroyuki Okada

Case reports in gastrointestinal medicine 2018 8054284 - 8054284 2018

Authorship：Lead author,　Corresponding author Language：English

A 62-year-old woman was diagnosed with extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) with increased plasma cell differentiation of the stomach. Esophagogastroduodenoscopy showed slightly elevated, whitish lesions in the gastric body. Magnifying endoscopic observation revealed that the gastric surface epithelium was swollen, but the structure was not destroyed or diminished. Elongated, tortuous vasculature was observed on the surface of the whitish lesions. The patient underwent eradication treatment for Helicobacter pylori, which resulted in complete remission. Although the appearance of abnormal vessels and the destruction of gastric epithelial structure are the typical features of gastric MALT lymphoma during magnifying endoscopy, the present case showed different features, which were rather similar to those observed in a previously reported case of gastric plasmacytoma. The current case indicates that magnifying endoscopic features are not uniform among gastric MALT lymphomas.

DOI： 10.1155/2018/8054284

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Two Cases of Leiomyoma in the Colon Masquerading as Other Types of Colonic Pedunculated Polyps. Reviewed International journal

Ailee Ikeda, Masaya Iwamuro, Takehiro Tanaka, Toshihiro Inokuchi, Asuka Nakarai, Yuusaku Sugihara, Keita Harada, Sakiko Hiraoka, Yoshiro Kawahara, Hiroyuki Okada

Case reports in gastrointestinal medicine 2018 8272313 - 8272313 2018

Authorship：Corresponding author Language：English

We describe two cases of leiomyoma in the colon that were diagnosed histologically after endoscopic resection. The first case was a 79-year-old Japanese woman who presented with a pedunculated polyp of 14 mm length at the splenic flexure. Preoperative diagnosis suggested a colonic mucosubmucosal elongated polyp. The second case was a 29-year-old Japanese woman who presented with a pedunculated polyp of 40 mm length at the hepatic flexure and had an ulcer on top of the polyp. Preoperative diagnosis suggested an inflammatory fibroid polyp. A pathological diagnosis of colonic leiomyoma was made after endoscopic resection in both cases. Both tumors were confirmed to originate, not from the proper muscle layer, but from the muscularis mucosae. These cases underscore that although colonic involvement is infrequent, leiomyomas can display pedunculated morphology in the colon rather than the typical gross appearance of gastrointestinal submucosal tumors seen with sessile morphology.

DOI： 10.1155/2018/8272313

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[Conservative management of gastric emphysema and hepatic portal venous gas: a case report].

Masaya Iwamuro, Yuki Okamoto, Hiromitsu Kanzaki, Seiji Kawano, Shunsuke Tanabe, Hiromasa Yamamoto, Yoshiro Kawahara, Hiroyuki Okada

Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology 115 ( 7 ) 655 - 661 2018

Language：Japanese Publishing type：Research paper (scientific journal)

A 69-year-old Japanese man underwent successful percutaneous endoscopic gastrostomy (PEG) without any intra-procedural adverse event. However, 3 days postoperatively, he presented with melena and bloody discharge from the gastrostomy tube. Computed tomography revealed gastric emphysema, hepatic portal venous gas, portal vein thrombosis, and swelling of the ascending colon. We administered antibiotics and discontinued enteral feeding; this resulted in resolution of gastric emphysema, hepatic portal venous gas, and portal vein thrombosis and an improvement in the swelling of the ascending colon. To the best of our knowledge, till date, only three patients have been reported to develop gastric emphysema and hepatic portal venous gas after PEG. All previously reported patients were treated with antibiotics and/or discontinuation of enteral feeding, exhibiting recovery within 6-14 days. Although the occurrence of gastric emphysema and hepatic portal venous gas after a PEG procedure is rare, conservative management can ensure recovery in such patients.

DOI： 10.11405/nisshoshi.115.655

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Severe Gastritis after Administration of Nivolumab and Ipilimumab

Yoshito Nishimura, Miho Yasuda, Kazuki Ocho, Masaya Iwamuro, Osamu Yamasaki, Takehiro Tanaka, Fumio Otsuka

CASE REPORTS IN ONCOLOGY 11 ( 2 ) 549 - 556 2018

Endoscopic Ultrasound-Guided Hepaticogastrostomy Is Effective for Repeated Recurrent Cholangitis after Surgery: Two Case Reports. Reviewed International journal

Akihiro Matsumi, Hironari Kato, Yousuke Saragai, Sho Mizukawa, Saimon Takada, Shinichiro Muro, Daisuke Uchida, Takeshi Tomoda, Kazuyuki Matsumoto, Masaya Iwamuro, Shigeru Horiguchi, Yoshiro Kawahara, Hiroyuki Okada

Case reports in gastrointestinal medicine 2018 7201967 - 7201967 2018

Language：English

We report the cases of two patients who underwent endoscopic ultrasound-guided hepaticogastrostomy (EUS-HGS) using metallic stents (MS) for recurrent cholangitis due to benign biliary stenosis. The patients had repeatedly undergone double-balloon endoscopy and anastomotic stenosis. Thus, EUS-HGS was performed. The procedures were successful, and placement of a covered metallic stent (C-MS) relieved cholangitis. The occurrence of cholangitis was subsequently considerably reduced. For patients with postoperative recurrent cholangitis, EUS-HGS with MS should be considered because of its efficacy and safety.

DOI： 10.1155/2018/7201967

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[Retention of patency capsule in a patient with Crohn's disease]. Reviewed

Masaya Iwamuro, Shiho Takashima, Toshihiro Inokuchi, Masahiro Takahara, Seiji Kawano, Sakiko Hiraoka, Yoshitaka Kondo, Takehiro Tanaka, Hiroyuki Okada

Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology 115 ( 2 ) 203 - 210 2018

Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)

A 40-year-old Japanese man with abdominal pain was referred to our hospital. The patient had been diagnosed with Crohn's disease at the age of 21 years and had since then received treatment with mesalazine and had been advocated an elemental diet. About 30 months before his visit to the hospital, he had swallowed a patency capsule, the retention of which in the ileum was subsequently detected on abdominal ultrasonography. The patient was advised to undergo the evaluation of stenosis, but he refused further investigation at that time. Computed tomography scanning performed at our institution revealed stenosis of the ileum and the presence of a high-density material in the proximal side of the stenosis. Double-balloon enteroscopy and enterography with contrast media revealed multiple stenoses of the ileum. The stenotic ileum was surgically resected, and a foreign body was removed. Electron microscopy analysis revealed that the foreign body was the cellophane wall of the PillCamTM patency capsule. Thus, the retention of the cellophane wall of a patency capsule after consumption was diagnosed for the current case on the basis of the study findings.

DOI： 10.11405/nisshoshi.115.203

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Lanthanum deposition in the stomach in the absence of Helicobacter pylori infection Reviewed

Masaya Iwamuro, Haruo Urata, Takehiro Tanaka, Seiji Kawano, Yoshiro Kawahara, Katsuhiko Kimoto, Hiroyuki Okada

Internal Medicine 57 ( 6 ) 801 - 806 2018

Esophageal granular cell tumors can be differentiated from leiomyomas using endoscopic ultrasonography Reviewed

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

Internal Medicine 57 ( 11 ) 1509 - 1515 2018

Two cases of white globe appearance in non-cancerous stomach. Reviewed International journal

Masaya Iwamuro, Takehiro Tanaka, Hiroyuki Sakae, Yasushi Yamasaki, Hiromitsu Kanzaki, Seiji Kawano, Yoshiro Kawahara, Hiroyuki Okada

Ecancermedicalscience 12 856 - 856 2018

Authorship：Lead author,　Corresponding author Language：English

In this report, we describe two patients with white globe appearance in the non-cancerous stomach. The patient in Case 1 was an 82-year-old Japanese man who had been taking vonoprazan, dimethicone, acotiamide, sitagliptin, candesartan, dutasteride, etizolam and zolpidem. The patient in Case 2 was a 74-year-old Japanese woman who had been taking esomeprazole, rebamipide, sitagliptin, candesartan, ezetimibe, mirabegron, levocetirizine, zolpidem and lactobacillus preparation. In both cases, endoscopy revealed multiple white spots in the stomach. Magnifying endoscopy and blue laser imaging revealed a slightly elevated, round, white substance. Biopsied specimens from the lesions contained parietal cell protrusions and fundic gland cysts. Intraglandular necrotic debris was absent. Consequently, microscopic features in these cases were different from those reported previously for white globe appearance observed in gastric cancer lesions. These results indicate that white globe appearance can be observed in non-cancerous stomach. Although the macroscopic features could be confusing or misleading, thorough endoscopic observation and pathological analysis of white globe appearance will aid oncologists and endoscopists in differentiating between cancer-related lesions and non-cancerous lesions.

DOI： 10.3332/ecancer.2018.856

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Clival Osteomyelitis with Cavernous Sinus Thrombosis Due to Fusobacterium nucleatum and Campylobacter rectus Induced by Tooth Extraction

Kosuke Oka, Yasuhiro Nakano, Yosuke Sazumi, Tomo Michitani, Shigeru Horiguchi, Kazuki Ocho, Masaya Iwamuro, Fumio Otsuka

INTERNAL MEDICINE 57 ( 22 ) 3325 - 3328 2018

Prediction of disseminated intravascular coagulation by liver function tests in patients with japanese spotted fever

Yuichi Miyashima, Masaya Iwamuro, Michihiko Shibata, Yoshio Miyabe, Yoshinari Kawai, Masanobu Kaihara, Takehide Mitogawa, Masaru Harada

Internal Medicine 57 ( 2 ) 197 - 202 2018

Prolonged epigastric pain caused by a leaf stem embedded in the gastric wall

Takahiro Yoshioka, Masaya Iwamuro, Haruo Takeda, Toshiyoshi Fujiwara

Internal Medicine 57 ( 17 ) 2497 - 2500 2018

A magnesium oxide bezoar

Masaya Iwamuro, Shunsuke Saito, Masao Yoshioka, Haruo Urata, Kumiko Ueda, Kazuhide Yamamoto, Hiroyuki Okada

Internal Medicine 57 ( 21 ) 3087 - 3091 2018

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Papers - IWAMURO Masaya