KIDNEY - Hydronephrosis

The specimen is a transected right kidney. The renal pelvis is markedly dilated and the dilatation extends into the major calyces. There is pressure atrophy of the renal medulla and one of the renal papillae appears necrotic. There is a renal stone embedded in the ureter approximately 3 cm distal to the pelvi-ureteric junction. The features are those of hydronephrosis secondary to impaction of a renal stone. This was an incidental finding at postmortem.