Background: Wolffian adnexal tumor (WAT) is a rare neoplasm originating from the remnants of the Wolffian duct (mesonephric duct). Malignant WAT occurring in the ovary is exceptionally uncommon. This ...

but the gonads histologically resemble testes rather than ovaries and there is a tendency for the Wolffian ducts to persist whereas the oviducts are absent or incomplete. Fusion of the placentæ ...