The simultaneous presence of primary carcinomas in the same patient is uncommon and synchronous primary tumors involving the kidney and ovary are extremely rare. There are a few reports in the English literature of synchronous primary malignancies of the kidney and the ovaries, but no data regarding their imaging features. We present a case of an elderly woman, diagnosed with bilateral ovarian clear cell carcinomas and a simultaneous clear cell carcinoma of the right kidney, evaluated by multidetector CT and MR imaging.