1. XanthogranulomatousXanthogranulomatous
PyelonephritisPyelonephritis
Rare severe chronic renal infectionRare severe chronic renal infection
Obstructive infective uropathy secondary toObstructive infective uropathy secondary to
calculicalculi
Lipid-laden macrophages - xanthoma cellsLipid-laden macrophages - xanthoma cells
Chronic clinical course of flank pain, feverChronic clinical course of flank pain, fever
and bacteriuria with malaise.and bacteriuria with malaise.
Retroperitoneal inflammatory reactionRetroperitoneal inflammatory reaction

2. Investigation;Investigation;
KUB - calculiKUB - calculi
CT Scan - renal mass with multiple smallCT Scan - renal mass with multiple small
abscessesabscesses
Management;Management;
Nephrectomy ± colectomy / splenectomyNephrectomy ± colectomy / splenectomy
Cutaneous FistulaCutaneous Fistula