Cystadenocarcinoma of the kidney: a profile of 13 cases

Cystadenocarcinoma is an uncommon variant of renal cell carcinoma that is cystic in appearance. Our experience with 13 of these tumors is presented. The biological behavior was similar to renal cell carcinoma in general, although a greater proportion presented as stage I lesions. Computerized tomography and cyst aspiration may be helpful to differentiate these tumors from simple cysts.