What is the role of urinalysis in the workup of hypercalciuria?

Updated: Apr 23, 2019
  • Author: Stephen W Leslie, MD, FACS; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

A urinary tract infection is suggested by the presence of leukocyte esterase, white blood cells (WBCs), nitrite, or bacteria on microscopic examination findings. A urinalysis also can identify hematuria, a common, but insensitive and nonspecific, finding in children with hypercalciuria.

The urinary pH and the presence of crystals also may help to identify possible clues or an explanation of the observed symptoms. Uric acid and calcium oxalate crystals are usually seen in acidic urine, whereas calcium phosphate and carbonate crystals are usually seen in alkaline urine. Similarly to hematuria, however, the presence of crystals or an abnormal pH is neither sensitive nor specific for hypercalciuria.


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