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Related Experiment Videos

The primary hyperoxalurias: an algorithm for diagnosis.

Dawn S Milliner1

  • 1Mayo Clinic Hyperoxaluria Center, Division of Nephrology, Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, Minn. 55905, USA. milliner.dawn@mayo.edu

American Journal of Nephrology
|April 28, 2005
PubMed
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Primary hyperoxalurias (PHs) are metabolic disorders causing excess oxalate. An evidence-based guideline aids early diagnosis in children and adults, improving outcomes for kidney disease and oxalosis.

Area of Science:

  • Biochemistry
  • Genetics
  • Nephrology

Background:

  • Primary hyperoxalurias (PHs) are inherited metabolic diseases characterized by excessive urinary oxalate excretion.
  • This leads to nephrolithiasis, nephrocalcinosis, and potentially fatal renal failure due to systemic oxalate deposition (oxalosis).
  • Diagnostic delays are common due to the rarity of PHs and specialized testing requirements.

Purpose of the Study:

  • To develop an evidence-based guideline for the diagnosis of primary hyperoxalurias.
  • To facilitate earlier recognition and treatment of PH patients.

Main Methods:

  • Development of an evidence-based diagnostic guideline for PHs.
  • Systematic approach to measuring urinary oxalate, glycolate, glycerate, and plasma oxalate.

Related Experiment Videos

  • Consideration of age-related variations in urinary oxalate levels.
  • Inclusion of molecular analysis (AGXT, GRHPR genes) and liver enzyme analysis for definitive diagnosis.

    • Main Results:

    • Patients with childhood stones/nephrocalcinosis, adult recurrent calcium oxalate stones, or renal insufficiency with stones/nephrocalcinosis require PH evaluation.
    • A structured diagnostic pathway is provided, accounting for age-specific normal ranges.
    • Genetic and enzyme analyses are crucial for confirming the diagnosis in specific PH types.

    Conclusions:

    • An evidence-based diagnostic algorithm can improve the recognition of PHs.
    • Earlier diagnosis enables timely intervention, potentially mitigating severe morbidity and mortality associated with oxalosis.