Malignant ovarian Brenner tumor. A case report evaluated with (18)F-FDG PET/CT.

We present a case of 59-year-old woman with clinical symptoms of a pelvic mass. She underwent an abdominal computed tomography (CT) scanning which demonstrated adnexal mass with solid and cystic components. The biopsy confirmed a malignant Brenner tumor. Then, a 18F-FDG PET/CT study was performed for disease staging and showed a high FDG uptake with heterogeneous distribution in solid component of the mass (Fig. 1) and FDG-avid lymphadenopathy in multiple locations above and below the diaphragm, as well as multiple focal FDG uptake in bones and mild FDG-avid in pulmonary nodules (Fig. 2). This leads to staging the tumor as stage IV. Brenner tumors are relatively uncommon tumors accounting for 1.5% of all ovarian tumors. They may be of benign, borderline or malignant nature (only 1% in these cases) and may be seen at any age. It is believed that these tumors originate from the coelomic epithelium of the ovary and the epithelial component