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Idiopathic hypercalcinuria

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Idiopathic hypercalcinuria (IH) is a condition including an excessive urinary calcium level with a normal blood calcium level resulting from no underlying cause. IH has become the most common cause of hypercalciuria and is the most serious metabolic risk factor for developing nephrolithiasis. IH can predispose individuals to osteopenia or osteoporosis, and affects the entire body. IH arises due to faulty calcium homeostasis, a closely monitored process, where slight deviations in calcium transport in the intestines, blood, and bone can lead to excessive calcium excretion, bone mineral density loss, or kidney stone formation. 50%-60% of nephrolithiasis patients suffer from IH and have 5%-15% lower bone density than those who do not.