Primary peritoneal low-grade serous carcinoma forming a mass in the colon mimicking a colonic primary carcinoma: a case report.

T A Tran, Tien Anh N. Tran, Tran TA, Holloway RW, Robert W. Holloway, R W Holloway
European journal of gynaecological oncology · 2013 · vol. 34(1) , pp. 86–9 · PMID:23590009 · W4959678
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This case report describes a primary peritoneal low-grade serous carcinoma presenting as a colonic mass, mimicking a primary colon cancer in a 66-year-old female patient.

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Abstract

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, which most likely denoted the precursors of the tumor in the colon.

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Condition tags

endometriosis

MeSH descriptors

Colonic Neoplasms Cystadenocarcinoma, Serous Peritoneal Neoplasms Aged Colonic Neoplasms Cystadenocarcinoma, Serous Female Humans Neoplasm Grading Peritoneal Neoplasms

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