Ovarian Mucinous Cystadenofibroma Mimicking Malignancy: A Case Report of a Rare Subtype.

Benign mucinous cystadenofibromas are very rare tumors of the ovary. They often mimic malignant pelvic tumors in terms of size and appearance. Here, we report a case of a 34-year-old female patient presenting with a 20 × 18 cm large abdominal mass. Clinically and radiologically, a diagnosis of a borderline malignant ovarian mass was made, and an exploratory laparotomy was planned. Intraoperative frozen section evaluation resulted in a diagnosis of benign mucinous cystadenofibroma. This highlights the need to consider mucinous cystadenofibroma as a differential diagnosis for large pelvic tumors and emphasizes the role of frozen section in the optimal surgical management of such cases.