Transitional cell carcinoma (TCC) of the ovary is a less well recognized histological type of ovarian carcinoma resembling Brenner tumor of the ovary and TCC of the urinary bladder, The immunohistochemical stains of TCC of the ovary differ from of TCC of the bladder, Usually, TCC of the ovary is significantly more chemosensitive and associated with a better prognosis than other types of common epithelial ovarian cancer. The different diagnosis of a primary or metastatic transitional cell carcinoma in the ovary is important and has therapeutic as well as prognostic implications.