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The long-term outcomes of idiopathic hypercalciuria in children

Yilmaz Tabel1, Sevgi Mir

  • 1Ege University, School of Medicine, Department of Pediatric Nephrology, Bornova, Izmir, Turkey. yilmaztabel@yahoo.com

Journal of Pediatric Urology
|October 25, 2008
PubMed

Insights

Idiopathic hypercalciuria (IH) is a common cause of urinary calcium stones. Determining the type of IH and using diet and thiazide therapies can help prevent new stone formation in affected patients.

Area of Science:

  • Nephrology
  • Pediatric Nephrology
  • Metabolic Bone Diseases

Background:

  • Idiopathic hypercalciuria (IH) is a significant metabolic risk factor in patients experiencing urinary calcium stones, contributing to 30%-50% of all such cases.
  • Understanding the clinical manifestations and subtypes of IH is crucial for effective management and patient outcomes.

Purpose of the Study:

  • To review the clinical manifestations and distribution of idiopathic hypercalciuria (IH) types in pediatric patients.
  • To evaluate current treatment strategies and long-term outcomes for patients with IH.
  • To identify risk factors and preventive measures for nephrolithiasis in IH patients.

Main Methods:

  • A cohort of 131 pediatric patients (70 boys, 61 girls) aged 1-15 years with IH was studied.
  • Patients were followed for 6 months to 16 years, with a mean follow-up of 4.1 years.
  • Diagnosis of absorptive and renal types of IH was based on calcium challenge tests.

Main Results:

  • Renal type IH was diagnosed in 40% of patients, and absorptive type in 39%.
  • Nephrolithiasis was present on admission in 20% of patients and developed in an additional 6.1% during follow-up.
  • Diet therapy normalized urinary calcium excretion in 65 patients, with definitive resolution in 26.7% and recurrence in 22.9%.

Conclusions:

  • Idiopathic hypercalciuria (IH) can be associated with nephrolithiasis, necessitating type determination for appropriate management.
  • Patients with absorptive type IH require close monitoring for nephrolithiasis.
  • Dietary modifications and thiazide therapy show promise in preventing new stone formation in patients with IH.
Abstract

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