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A case of hypervitaminosis D in an older patient

This case focuses on how a patient acquired a toxic and very high level of vitamin D while on a recommended daily maintenance dose. It emphasises the need for best practice to ensure patients’ safety in terms of monitoring of vitamin D levels in patients with renal failure to prevent vitamin D toxicity.

First published March 2018, updated June 2022 IntroductionCase reportDiscussionConclusionReferences   Introduction Vitamin D and sunlight play a pivotal role in the homeostasis of calcium and bone strength in our body, but an excess amount can lead to hypervitaminosis D, which is a rare but potentially serious condition. This is a case of a 92-year-old woman who presented with confusion, renal failure (acute on chronic kidney disease€”stage 3) and hypercalcemia. She was recurrently admitted and her investigations showed high calcium, low phosphate and high vitamin D levels. A thorough series of tests were carried out to find the cause of hypercalcemia.

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