Sertoli-Leydig cell tumors account for less than 0.5% of all ovarian cancers. Here we report the case of a 64-year-old patient who had previously undergone left oophorectomy. She underwent a pelvic scan because of lower abdominal pain. Transvaginal sonography showed a right ovary with normal gray scale images. Color Doppler sonography showed intense blood flow inside the gonad, with a low resistive index. After laparoscopic removal of this ovary, histologic examination revealed an intermediately differentiated Sertoli-Leydig cell tumor. Our findings suggest that intensely vascularized ovaries in postmenopausal patients should be closely followed, and histologic evaluation should be considered if these characteristics persist, even in normal-sized gonads Ver menos