A 50-year-old male presents with a history of recurrent kidney stones and osteopenia. He has been taking high-dose vitamin D supplements due to a previous diagnosis of vitamin D deficiency. Laboratory results reveal hypercalcemia and hypercalciuria. What is the likely diagnosis, and what is the treatment?
This patient's history of recurrent kidney stones, osteopenia, and high-dose vitamin D supplementation, along with laboratory findings of hypercalcemia and hypercalciuria, suggest the possibility of vitamin D toxicity. Excessive intake of vitamin D can cause increased absorption of calcium from the gut, leading to hypercalcemia and hypercalciuria, which can result in kidney stones and bone loss. Treatment would involve stopping the vitamin D supplementation and potentially providing intravenous fluids and loop diuretics to promote the excretion of calcium.