Rare case of carcinoid tumor arising within teratoma in kidney.

Not all enhancing lesions in the kidney are renal cell carcinoma. We report a rare case of a carcinoid tumor arising within a teratoma of the kidney in an asymptomatic female patient. Carcinoid tumors and teratomas involving the kidneys are rare. The two entities existing simultaneously in the same kidney are exceptionally unique. Still, the radiographic characteristics of these lesions have been previously described and should be familiar to practicing physicians.