RADIOLOGY: KIDNEY: Case# 33699: COMPLEX CYST IN THE RIGHT KIDNEY, SUSPICIOUS FOR RENAL CELL CARCINOMA. 54 year old male. 1. Complex cyst in the right kidney with an enhancing peripheral nodule located in the inferior portion. In addition there is a enhancing perceptible rim around this cyst. This remains highly suspicious for renal cell carcinoma. 2. Continued diffuse fatty infiltration of the liver.