Giant brenner tumor of ovary

Brenner tumor is a rare ovarian tumor that is a part of the surface epithelial group of ovarian neoplasm. It is usually asymptomatic, and most of the times, it is an incidental pathological finding. They can be subdivided into benign, borderline or proliferative, and malignant neoplasms. The majority of Brenner tumors are benign in nature. Tumors of borderline malignancy are less frequent, and only about 1% of tumors are borderline. Here, we present a rare case of giant Brenner tumor of ovary measuring 28 cm in diameter. This is the case is presented because the giant size of Brenner tumor, although rare gynecologist should be aware of this rare entity.