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Salicylate-induced proximal tubular dysfunction.

Vasilis Tsimihodimos1, Nikolaos Psychogios, Varvara Kakaidi

  • 1Department of Internal Medicine, Medical School, University of Ioannina, Ioannina, Greece.

American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation
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Summary

Aspirin overdose can cause temporary Fanconi syndrome, a kidney tubule disorder. This case shows rapid reversibility of salicylate-induced proximal tubular dysfunction in a young patient.

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Area of Science:

  • Nephrology
  • Toxicology
  • Biochemistry

Background:

  • Salicylate poisoning can lead to various toxic effects.
  • Proximal tubular dysfunction is a known, though less common, complication of aspirin overdose.
  • Fanconi syndrome is characterized by impaired reabsorption in renal tubules.

Observation:

  • A 17-year-old female presented with symptoms of drug poisoning after ingesting 12.5g of acetylsalicylic acid (aspirin).
  • Within 12 hours, she developed generalized proximal tubular dysfunction, including glucosuria, proteinuria, and uric acid wasting, despite normal serum glucose.
  • Urine analysis using proton nuclear magnetic resonance spectroscopy confirmed proximal tubular injury.

Findings:

  • The patient exhibited a rapidly reversible salicylate-induced proximal tubular dysfunction.
  • Electrolyte excretion normalized within 2 days post-ingestion.
  • Follow-up testing at 15 days showed complete resolution of tubular dysfunction.

Implications:

  • This case highlights the potential for acute, reversible Fanconi syndrome following massive aspirin overdose.
  • It underscores the importance of monitoring renal function in salicylate poisoning.
  • Understanding the mechanisms of salicylate-induced tubular injury can inform clinical management and treatment strategies.