title: Clear cell carcinoma and endometrioid carcinoma arising in a endometriotic cyst of the ovary.
abstract: A case of two tumors arising in an endometriotic cyst of the ovary is described. These two tumors are macroscopically polypous and are histologically a clear cell carcinoma and an endometrioid carcinoma, respectively. This is a rare neoplasm and its existence supports the general opinion that clear cell carcinoma and endometrioid carcinoma of the ovary are both müllerian in origin.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000328:Adult; D002471:Cell Transformation, Neoplastic; D004715:Endometriosis / Q000473:pathology*; D005260:Female; D006801:Humans; D009095:Mullerian Ducts; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology*