Relatively enlarged and poorly enhancing right kidney with moderate hydronephrosis. A non-enhancing hyper density is seen in the right renal pelvis and proximal right ureter. Given the clinical history of hematuria, this most likely represents blood clots; however possibility of underlying mass lesion cannot be entirely ruled out. No contrast excretion is seen from the right kidney. Small simple cyst at the upper pole of left kidney and a small cortical scar at the lower pole of left kidney. Colonic diverticulosis involving the transverse and descending colon.