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Case report
Acute oxalate nephropathy due to high vitamin C doses and exocrine pancreatic insufficiency
  1. Lauré Fijen and
  2. Marcel Weijmer
  1. Internal Medicine, OLVG, Amsterdam, The Netherlands
  1. Correspondence to Lauré Fijen; laurefijen1994{at}


Oxalate kidney injury can manifest as oxalate nephropathy or nephrolithiasis and present as acute kidney injury or even as end-stage renal disease. There are several known causes for acute oxalate nephropathy; however, the combination of exocrine pancreatic insufficiency with overconsumption of vitamin C has not been described before. In this case, a man in his early 80s presented with anorexia and extreme fatigue for 1 week. He had a history of myalgic encephalomyelitis, also known as chronic fatigue syndrome, for which he took several supplements, including high doses of vitamin C. Furthermore, several years ago, he was diagnosed elsewhere with exocrine pancreatic insufficiency. On admission, acute kidney injury was diagnosed. The kidney biopsy showed oxalate nephropathy as the cause. We diagnosed acute oxalate nephropathy due to high vitamin C doses and exocrine pancreatic insufficiency. Within 14 days, his kidney function got worse and he required renal replacement therapy.

  • renal system
  • vitamins and supplements
  • renal medicine
  • acute renal failure

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  • Contributors LF and MW both contributed substantially to the conception and planning of the work. LF wrote the first draft after acquiring the data from the patient’s file, whereafter both MW and LF revised and redrafted the work several times. LF and MW gave their final approval of the version to be published and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.