Brenner tumor of the ovary: Incidental finding with unusual combinations

Abstract

The most common ovarian tumors are surface epithelial tumors, comprising 58% of all ovarian tumors. Among them, serous and mucinous cystadenomas are the most common (35%). A Brenner tumor is a rare, mostly benign type of ovarian epithelial neoplasm with an incidence of 1%–2%. Rarely, they occur in other locations, including the testis. The majority of Brenner tumors are benign; however, some can be malignant. These are most frequently found incidentally on pelvic examinations or during laparotomy. In the present case series, we report three cases of Brenner tumors diagnosed incidentally on histopathology. The first case was a rare combination of serous cystadenoma, with a focus showing a Brenner tumor in the wall of serous cystadenoma. The second case was a proliferating Brenner tumor in the wall of mucinous cystadenoma, and the third case had bilateral benign Brenner tumors.