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Diffuse nephrocalcinosis and idiopathic renal hypercalciuria.

V K Aggarwal1, K V Jones

  • 1Department of Renal Medicine, Royal Infirmary, Cardiff.

Archives of Disease in Childhood
|July 1, 1989
PubMed
Summary

Idiopathic hypercalciuria, a condition causing excess calcium in the urine, was identified as a novel cause of nephrocalcinosis in a pediatric patient. This finding expands the known causes of kidney calcification in children.

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Area of Science:

  • Pediatric Nephrology
  • Medical Research
  • Clinical Case Study

Background:

  • Primary nocturnal enuresis is common in children.
  • Nephrocalcinosis involves calcium deposits in the kidneys.
  • The etiology of nephrocalcinosis can be diverse, but idiopathic hypercalciuria is rarely implicated.

Observation:

  • A 12-year-old boy presented with primary nocturnal enuresis.
  • Extensive bilateral nephrocalcinosis was discovered without an apparent cause.
  • Diagnostic tests confirmed persistent, severe renal hypercalciuria.

Findings:

  • The study identified idiopathic hypercalciuria as the cause of nephrocalcinosis.
  • This represents the first reported case of idiopathic hypercalciuria causing nephrocalcinosis in a child.
  • Renal hypercalciuria was confirmed via intravenous calcium infusion.

Implications:

  • This case broadens the differential diagnosis for pediatric nephrocalcinosis.
  • It highlights the importance of investigating hypercalciuria in children with unexplained kidney calcifications.
  • Further research may elucidate the mechanisms linking idiopathic hypercalciuria to nephrocalcinosis in pediatric populations.

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