IMR Press / EJGO / Volume 34 / Issue 1 / pii/1630905361999-28173959

European Journal of Gynaecological Oncology (EJGO) is published by IMR Press from Volume 40 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Case Report
Primary peritoneal low-grade serous carcinoma forming a mass in the colon mimicking a colonic primary carcinoma: a case report
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1 Department of Pathology, Florida Hospital Orlando, Orlando, Florida (USA)
2 Department of Gynecological Oncology, Florida Hospital Orlando, Orlando, Florida (USA)
Eur. J. Gynaecol. Oncol. 2013, 34(1), 86–89;
Published: 10 February 2013

Primary carcinomas of Müllerian origin involving the colon is not an uncommon phenomenon, with most cases reportedly associated with endometriosis. On the other hand, a primary peritoneal low-grade serous carcinoma presenting as a dominant mass in the colon and causing clinical symptoms mimicking a primary colonic carcinoma has not been reported in the literature to the best of the authors’ knowledge. A case of a 66-year-old female patient who presented clinically with rectal bleeding and a rectosigmoid mass is described. The final histologic examination revealed a peritoneal low-grade serous carcinoma forming a dominant mass in the rectosigmoid colon. Of particular interest was a microscopic spectrum of serous epithelial proliferation in the peritoneal cavity and lymph nodes with morphologic features reminiscent of non-invasive and invasive implants in ovarian borderline serous tumors, whichmost likely denoted the precursors of the tumor in the colon.
Low-grade serous carcinoma
Colonic mass
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