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Ovarian Thecoma
Definition 1
A stromal tumor that arises from the ovary and is characterized by the presence of cells that contain lipid and resemble theca cells. The vast majority of cases are benign. (NCI Thesaurus)
Definition 2
A sex cord-stromal tumor of the postmenopausal ovary that is yellow, large, and unilateral, composed of fascicles of lipid-rich spindle cells interspersed with collagen, reticulin fibers, and hyaline plaques. Thecomas and other estrogen-producing tumors (e.g., granulosa cell tumors) may induce adenomatous hyperplasia of the endometrium or well-differentiated endometrial carcinoma in 3%-20% of the cases. (Segen, Dictionary of Modern Medicine, 1992) (NLM, Medical Subject Headings)
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