Oxalate Nephropathy Secondary to Enteric Hyperoxaluria: A Rare Cause of End Stage Renal Failure – A Report of 2 Cases

This article reports on two cases of oxalate nephropathy secondary to enteric hyperoxaluria, a rare cause of end-stage renal failure. The first case involves an 82-year-old man with a solitary kidney who experienced a decline in renal function following a small bowel resection due to volvulus. Despite initial improvement, his renal function deteriorated, leading to haemodialysis. The second case is a 75-year-old man with a history of Crohn's disease and multiple bowel surgeries, whose renal function also declined progressively, resulting in haemodialysis. Both cases underscore the importance of considering enteric hyperoxaluria in patients with unexplained renal function decline post-bowel surgery, due to the typically poor prognosis.