A rare ovarian Leydig cell tumor (hilar type) causing virilization in a postmenopausal woman.

All patients with virilization signs, increased levels of androgen hormones and rapidly progressive hirsutism should be evaluated for an androgen-producing tumor. The ovarian origin of virilization can be suspected by the presence of elevated levels of circulating androgens, with normal levels of cortisol metabolites and a negative dexamethasone suppression test. A case report of a 50-year-old postmenopausal patient with rapidly progressive hirsutism is presented. After an extensive preoperative investigation a right oophorectomy was performed and a Leydig-hilus cell tumor was diagnosed.