Unilateral Hydronephrosis and Pyelonephritis
Unilateral Hydronephrosis and Pyelonephritis

The panels show the right and left kidneys of a patient. Note the dilated pelvis and calyces on the right compared to the left.
Autopsy showed metastatic colonic carcinoma involving the right hilar and peri-ureteral soft tissues. The tumor in this area has caused outflow obstruction on the right, resulting in hydronephrosis and acute pyelonephritis.
(Description By:H. Yamase, M.D. )
(Image Contrib. by: UCHC )