Xanthogranulomatous pyelonephritis

Discussion:

Xanthogranulomatous pyelonephritis is a chronic destructive granulomatous process of renal parenchyma in association with long-term urinary tract obstruction and infection.

Clinical presentation includes flank or abdominal pain, lower urinary tract symptoms, fever, palpable mass, hematuria and weight loss.

This case shows a xanthogranulomatous pyelonephritis associated with staghorn calculus and complicated with extensive retroperitoneal abscess.

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