CT - CT urography
The unenhanced CT phase showed an oval hypodense exophytic lesion in the upper pole of the left kidney, in the corticomedullary zone. After contrast injection examination revealed contrast filling of the cyst with fluid level within the cyst, confirming communication between the renal cyst and the collecting system and patency of the diverticular infundibulum. Two small calyceal diverticula are also visible on the right in the thickness of the cortex; there are no kidney stones or hydronephrosis. Few bilateral peripelvic cysts are noted.