Precursor lesions of ovarian epithelial malignancy

K M Feeley, Michael Wells, M Wells
Histopathology · 2001 · vol. 38(2) , pp. 87–95 · doi:10.1046/j.1365-2559.2001.01042.x · PMID:11207821 · W2166500526
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⚙ AI-generated summary by claude@2026-06, 2026-06-07 ⓘ

Ovarian carcinomas likely originate from the ovarian surface mesothelium or inclusion cysts, with Müllerian metaplasia in inclusion cysts potentially initiating serous carcinomas, while endometriosis may give rise to clear cell and endometrioid carcinomas.

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Abstract

Most ovarian carcinomas arise from the mesothelial surface lining of the ovaries, or from invaginations of this lining into the superficial ovarian cortex to form cortical inclusion cysts. The native ovarian surface mesothelium is of an 'uncommitted' phenotype, and has potential to modulate to epithelial or mesenchymal phenotypes in response to signals such as those associated with ovulation. The exposure of the mesothelial lining of an inclusion cyst to the ovarian stromal microenvironment may be responsible for the phenotypic change to Müllerian epithelium so commonly seen in these cysts. Müllerian metaplasia is usually to a serous phenotype, and it is possible that undefined molecular events occurring in an inclusion cyst that has undergone Müllerian metaplasia may initiate neoplastic change in these cysts. This may be the developmental pathway of most invasive serous carcinomas. Occasional rare cases of ovarian intraepithelial neoplasia, manifested by epithelial atypia in an inclusion cyst or on the surface epithelium without invasive carcinoma, are identified histologically. Serous borderline tumours represent a separate category and in most cases probably do not progress to frank carcinoma. Mucinous carcinomas may in some cases have arisen from pre-existing benign and borderline mucinous tumours. Endometriosis of the ovary is associated with genetic abnormalities and is frequently found in association with clear cell and endometrioid carcinomas, suggesting that in many cases these latter two types of carcinoma may have arisen directly from endometriotic deposits. Ovaries removed prophylactically from women with a family history of ovarian carcinoma or with a mutation in one of the genes predisposing to ovarian carcinoma should be processed in their entirety, and examined closely not just for obviously neoplastic lesions, but also for more subtle morphological abnormalities of the surface epithelium or the epithelium lining cortical inclusion cysts.

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Condition tags

endometriosis

MeSH descriptors

Carcinoma Ovarian Neoplasms Precancerous Conditions Carcinoma Carcinoma Carcinoma Endometriosis Endometriosis Endometriosis Epithelium Epithelium Female Genetic Predisposition to Disease Humans Ovarian Neoplasms Ovarian Neoplasms Ovarian Neoplasms Precancerous Conditions Precancerous Conditions

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References (75)

Cited by (22)

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