What is hypercalciuria?

Updated: Jun 02, 2021
  • Author: Stephen W Leslie, MD, FACS; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Hypercalciuria, or excessive urinary calcium excretion, is the most common identifiable cause of calcium kidney stone disease. Idiopathic hypercalciuria is diagnosed when clinical, laboratory, and radiographic investigations fail to delineate an underlying cause of the condition. Secondary hypercalciuria occurs when a known process produces excessive urinary calcium.

The following are the most common types of clinically significant hypercalciuria:

  • Absorptive hypercalciuria
  • Renal phosphate leak hypercalciuria (also known as absorptive hypercalciuria type III)
  • Renal leak hypercalciuria
  • Resorptive hypercalciuria - This is almost always caused by hyperparathyroidism

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