Clear cell carcinoma arising from sigmoidal subserosal endometriosis

Tomihiro Shimamoto, Yasuharu Nagai, Yumi Hoshino, Yu Ueda, Taro Shimizu, Takuya Nishikawa, Takuo Hayashi, H Tateyama
In: International Journal of Clinical Oncology · 1999 · vol. 4(5) , pp. 311–314 · doi:10.1007/s101470050075 · W2018804739
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⚙ AI-generated summary by claude@2026-06+body, 2026-06-11 ⓘ

This case report describes a 43-year-old woman with clear cell carcinoma arising from sigmoidal subserosal endometriosis, initially diagnosed via cytology and later treated with radical surgery and chemotherapy.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-07 · read from full text ⓘ

This paper reports an unusual case of clear cell carcinoma arising from endometriosis in a 43-year-old woman with a right adnexal tumor identified as a sigmoidal subserosal mass during laparotomy, alongside endometriosis externa and enlarged ovaries. Intraoperative and subsequent aspiration cytology suggested adenocarcinoma, but further surgery was initially postponed due to the tumor’s atypical nature and postoperative information constraints; the tumor later enlarged, prompting repeat laparotomy with extensive resection including hysterectomy, bilateral salpingo-oophorectomy, lymphadenectomy, and colostomy. The patient received two postoperative chemotherapy courses (cisplatin, epirubicin, cyclophosphamide) and had no recurrence 7 months after the second surgery. The paper does not explicitly state limitations beyond being a single case report. This paper is centrally about endometriosis—clear cell carcinoma arising from sigmoidal subserosal endometriosis.

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Abstract We present an unusual case of clear cell carcinoma arising from endometriosis in a 43-year-old woman. During laparotomy, a right adnexal tumor was found to be a sigmoidal subserosal tumor. Concomitant abnormal findings were endometriosis externa and enlarged ovaries. Intraoperative cytology suggested an adenocarcinoma; however, because of the unusual nature of the tumor and because the patient had not been fully informed about colostomy, further surgery was postponed. During the postoperative follow-up, the tumor grew and repeat aspiration cytology also suggested an adenocarcinoma. The patient again underwent laparotomy, and a Miles operation, total abdominal hysterectomy, bilateral salpingo-oophorectomy, regional lymphadenectomy and descending colostomy were performed. The patient completed two courses of multidrug chemotherapy (cisplatin, 70 mg/m2; epirubicin, 50 mg/m2; cyclophosphamide, 500 mg/m2) postoperatively, and she remains without recurrence 7 months after the second laparotomy. Similar content being viewed by others Author information Authors and Affiliations Additional information Received: July 22, 1998 / Accepted: April 12, 1999 About this article Cite this article Shimamoto, T., Nagai, Y., Hoshino, Y. et al. Clear cell carcinoma arising from sigmoidal subserosal endometriosis. Int J Clin Oncol 4, 311–314 (1999). https://doi.org/10.1007/s101470050075 Issue date: DOI: https://doi.org/10.1007/s101470050075

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endometriosis

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