[Secondary oxalosis following small bowel resection with kidney insufficiency and oxalate vasculopathy]

A 58-year-old female patient admitted to hospital for advanced renal failure had a 40 years' history of Crohn's disease and had undergone ileocecal resection. Nevertheless, chronic diarrhea persisted. Subsequently calcium oxalate stones in the urine were repeatedly observed. Progressive renal failure developed. The investigation of the patient showed severe steatorrhea and pronounced hyperoxaluria, and renal biopsy showed severe chronic interstitial nephritis with calcium oxalate crystals. The skin biopsy revealed severe calcium oxalate vasculitis. The pathophysiology and therapy of secondary hyperoxaluria due to small bowel resection are discussed.