A Case of Endometrioid Adenocarcinoma Arising from Endometriosis of the Sigmoid Colon Concurrently with Ovarian Endometrioid Adenocarcinoma

Masaya Suenaga, Toshiaki Mori, Akiharu Ishiyama, Kazuki YOKOI, Yuichi Suzuki, Jiro Kimura, Hiroaki Ozawa
In: The Japanese Journal of Gastroenterological Surgery · 2013 · vol. 46(5) , pp. 385–392 · doi:10.5833/jjgs.2012.0225 · W2325725527
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⚙ AI-generated summary by claude@2026-06, 2026-06-07 ⓘ

A 46-year-old woman with sigmoid colon and ovarian endometrioid adenocarcinomas simultaneously arising from endometriosis was treated with surgery and adjuvant chemotherapy, achieving a 5-year survival.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-07 ⓘ

This case report describes a 46-year-old woman admitted for abdominal pain with a ruptured right ovarian tumor and imaging findings suggestive of malignancy (right ovarian cystic tumor ~8 cm) alongside a sigmoid colon type 2 lesion seen on colonoscopy. Surgery was performed with an intraoperative impression of sigmoid colon cancer and ovarian cancer; histopathology identified endometrioid adenocarcinoma in both sites, and additionally showed transitional areas from endometrial-type tissue to carcinoma in each lesion, leading the authors to diagnose synchronous cancers arising from ectopic endometriosis of the sigmoid colon concurrent with ovarian endometrioid adenocarcinoma. Periintestinal lymph node metastases were present, but the patient achieved 5-year survival following postoperative adjuvant chemotherapy, and the authors note that malignant transformation of intestinal endometriosis is rare with no prior reports of simultaneous cases with ovarian cancer. This paper is centrally about endometriosis — it reports synchronous endometrioid adenocarcinoma arising from sigmoid colon endometriosis concurrent with ovarian endometrioid adenocarcinoma.

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Abstract

症例は46歳の女性で，腹痛を主訴に当院受診し，右卵巣腫瘍破裂の診断で入院となった．腹部CT，MRIにて右卵巣に8 cm大の囊胞性腫瘍を認め，悪性が疑われた．また，大腸内視鏡検査ではS状結腸に2型病変を認め，S状結腸に浸潤する卵巣癌と診断し手術を施行した．術中所見では卵巣癌に浸潤所見は認めず，S状結腸癌，卵巣癌の重複と考え，S状結腸切除術，卵巣癌手術を施行した．病理組織学的検査でS状結腸腫瘍には腺癌像を認め，類内膜腺癌と診断した．卵巣腫瘍も類内膜腺癌と診断されたが，S状結腸腫瘍と右卵巣腫瘍にはそれぞれに子宮内膜組織から癌への移行像を認め，異所性子宮内膜から同時発生した重複癌と診断した．腸管傍リンパ節には転移を認めたが，術後補助化学療法を行い5年生存を得ている．腸管子宮内膜症の癌化はまれであり，卵巣癌との同時発生例は報告をみない．腸管子宮内膜症癌化の報告例の文献的考察を加えて報告する．

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endometriosis

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Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

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