Ovarian Mesonephric Carcinosarcoma

**Semantic type:** Neoplastic Process

**Definition:** An exceedingly rare malignant neoplasm that arises from the ovary and is characterized by the presence of malignant glandular (adenocarcinoma) and malignant mesenchymal (sarcomatous) components. It derives from Wolffian duct remnants and shows mesonephric differentiation.