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

## TL;DR

A rare benign ovarian tumor was mistaken for a malignant one, highlighting the importance of accurate diagnosis during surgery.

## Contribution

The case emphasizes the value of frozen section analysis in distinguishing benign from malignant pelvic tumors.

## Key findings

- A 34-year-old patient had a large abdominal mass initially suspected to be malignant.
- Frozen section analysis confirmed the diagnosis of benign mucinous cystadenofibroma.
- The case underscores the importance of considering rare benign tumors in differential diagnosis.

## Abstract

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.