Bilateral stromal Leydig cell tumour of the ovary. Case report and literature review.

The stromal Leydig cell tumour of the ovary is a very rare benign neoplasm which usually occurs in postmenopausal women. Due to a significant production of androgens by the tumour, it is frequently associated with symptoms of virilization. To our knowledge only 7 cases have been reported in the literature, one of them with bilateral manifestation. We report an additional case affecting both ovaries in a 59-year-old nun with long-standing virilism, review the literature, and discuss the histomorphological features for differential diagnosis.