A large predominantly fat attenuating relatively exophytic lesion arising from interpolar region of left kidney: 10 x 7 x 7.5 cm. The lesion is abutting the left psoas muscle. No invasion. Effacement of the renal parenchyma and collecting system is noted. No discrete hydronephrosis. No nephrolithiasis.
Right kidney is normal. No focal lesion, hydronephrosis or nephrolithiasis.