Borderline Brenner Tumor of the Ovary in a Postmenopausal Woman: A Rare Case with Concomitant Endometrial Hyperplasia and Endocervical Polyp

Bordeline Brenner tumors of the ovary are rare tumors accounting for 2% of all ovarian tumors and are characterized by the presence of papillary structures covered with transitional epithelium without or minimal stromal invasion. In the present case report a 60-year-old postmenopausal woman presented with complaints of lower abdominal pain and a right ovarian mass of 4x5cm, which was diagnosed on histopathological examination as borderline Brenner tumor of the ovary. There were coexisting nonatypical endometrial hyperplasia and endocervical polyps of 1.2x0.9x0.6cm, indicating endometrial hyperstimulation as a result of estrogen secreted by the tumor. The patient was managed successfully with staging laparotomy and was diagnosed with stage I borderline Brenner tumor with non-atypical endometrial hyperplasia and benign endocervical polyp. Borderline Brenner tumors are rare tumors of ovaries with uncertain malignant potential. They have no precise predictive markers but are known to produce estrogen. Surgery remains the mainstay of treatment for these tumors.