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Typical Endoscopic Findings Combined with Immunohistochemical Analysis were Useful for Diagnosis of Endometriosis of the Rectum, Report of a Case Tomofumi Akasaka 1 , Motohiko Kato 2 , Keiichirou Honma 3 , Takuya Inoue 4 , Minoru Shigekawa 4 , Yoshiki Tsujii 4 , Tetsuji Fujinaga 4 , Akira Maekawa 4 , Yoshito Hayashi 4 , Takuya Yamada 4,5 , Shinichiro Shinzaki 4 , Tsutomu Nishida 4 , Hideki Iijima 4 , Masahiko Tsujii 4 , Eiichi Morii 3 , Tetsuo Takehara 4 1Department of Gastrointestinal Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan 2Division of Gastroenterology, National Hospital Organization Tokyo Medical Center, Tokyo 3Department of Diagnostic Pathology, Osaka University Hospital, Osaka, Japan 4Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Osaka, Japan 5Department of Gastroenterology, National Hospital Organization, Osaka National Hospital, Osaka, Japan Keyword: 腸管子宮内膜症 , 血便 , 粘膜下腫瘍 , 直腸 , 免疫染色 pp.1784-1789
Published Date 2014/11/25
DOI https://doi.org/10.11477/mf.1403200060
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 A woman in her 40s visited our hospital because of hematochezia. Colonoscopy revealed a 20mm diameter submucosal-like tumor in the right anterior wall of the rectum. The surface of the tumor was slightly irregular, and there was a reddish nodule on the surface of the tumor. Endoscopic ultrasonography revealed a thickened 4th layer with an enclosed hyperechoic nodule and a 20mm hypoechoic mass outside the rectal wall. The 3rd layer was disrupted below the reddish nodule on the surface. Although adenocarcinoma was detected by HE staining of a biopsy specimen, the mass was diagnosed as endometriosis of the rectum because it was positive for estrogen receptor, progesterone receptor, and vimentin by immunostaining. The patient received gonadotropin-releasing hormone agonist treatment, and the tumor regressed in size three months after initiation of therapy.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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