Granulosa Cell Tumor-like Variant of Endometrioid Carcinoma of the Ovary with Osseous Metaplasia: Report of a Rare Case

The sex cord-like variant of endometrioid carcinoma is a rare subtype with a closehistological resemblance to the sex cord-stromal tumor of the ovaries, in particular thesertoli cell tumor. however, very few cases of the granulosa cell tumor-like variant havebeen reported since it is commonly misdiagnosed as a granulose cell tumor. immunohistochemistryis useful in the diagnosis of these tumors as they are typically negativefor inhibin alpha. we herein describe the histological and immunohistochemicalfeatures of a rare case of granulosa cell tumor-like variant of endometrioid carcinomaof the ovary with extensive areas of hyalinization, calcification and osseous metaplasiain a 45-year-old female patient.