NCIt definition : An ovarian or testicular stromal tumor characterized by the presence of lipid-rich
neoplastic spindle cells. In females, uterine bleeding is the most common symptom.
A minority of post-menopausal women with thecoma have an associated endometrial adenocarcinoma
or rarely a malignant mixed mullerian tumor or endometrial stromal sarcoma. Rare cases
with nuclear atypia and mitotic activity may metastasize. In males, thecomas are rare
and they usually present as slow growing, sometimes painful masses. Metastases have
not been reported.;