A case of reversible hyperoxaluria nephropathy early after roux-en-y-gastric bypass induced by vitamin C intake

Roux-en-y-gastric bypass (RYGB) is the most commonly performed bariatric procedure worldwide which is taking the lead in resolving of comorbid conditions. Short- and long-term complications of RYGB procedure have been recognized, including osteopenia, osteomalacia and more rarely neurological disorders. Oxalate nephropathy is a complication of RYGB that has been described earlier in the literature and may end with renal failure and dialysis if not recognized and treated early. The etiology of this phenomenon is still unclear, but the length of common limb remains the theory that mostly contributed to its development. We believe that this limb should be more than 100 cm to prevent severe malabsorption. Here, we report a reversible case of oxalate nephropathy 3 months after RYGB in a 51-year-old patient.