Carcinosarcoma of the Ovary Arising in the Background of a Mucinous Neoplasm Distinct From a Mural Nodule.

Carcinosarcoma of the ovary (CSO) is a rare, aggressive biphasic neoplasm characterized by the simultaneous presence of malignant epithelial and mesenchymal components. Mural nodules, on the other hand, are circumscribed nodules in primary ovarian mucinous neoplasms that may harbor sarcoma-like, sarcomatous, or anaplastic elements. We describe a case of a 59-year-old female patient with CSO, originating in the background of cystic mucinous neoplasm, showing features distinct from a mural nodule. The case highlights diagnostic considerations and overlapping features of these complex ovarian tumors.