Xanthogranulomatous Pyelonephritis

Xanthogranulomatous pyelonephritis (XPN) is an variant of chronic pyelonephritis difficult to differentiatefrom renal malignancy on preoperative evaluation.We report an unusual case of XGP occurring in animmunocompetent patient in the absence of either urinary obstruction or nephrolithiasis, presenting as adiagnostic dilemma.