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Xanthine urolithiasis in a dachshund

T Flegel1, R Freistadt, W Haider

  • 1Department of Veterinary Surgery, School of Veterinary Medicine, Free University, Berlin, Germany.

The Veterinary Record
|November 10, 1998
PubMed
Summary

A two-year-old dachshund developed xanthine calculi due to a xanthine oxidase enzyme disorder. This impaired the transformation of xanthine to uric acid, leading to high urine xanthine concentrations.

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Area of Science:

  • Veterinary Medicine
  • Biochemistry
  • Canine Urology

Background:

  • Xanthine is a purine metabolite normally converted to uric acid.
  • Xanthine oxidase is the key enzyme responsible for this metabolic conversion.
  • Disorders in purine metabolism can lead to stone formation in animals.

Observation:

  • A two-year-old male dachshund presented with calculi in its kidneys, ureters, and bladder.
  • The calculi were described as yellow-greenish in color.
  • Analysis revealed these calculi were composed of xanthine.

Findings:

  • The calculi formation was attributed to an impaired transformation of xanthine to uric acid.
  • This metabolic defect resulted in elevated concentrations of xanthine in the urine.
  • A probable disorder of the xanthine oxidase enzyme was identified as the underlying cause.

Implications:

  • This case highlights a rare metabolic disorder in canines leading to xanthine urolithiasis.
  • Understanding xanthine oxidase function is crucial for diagnosing and managing purine-metabolizing disorders.
  • Early detection and management can prevent severe renal complications and urinary obstruction in affected dogs.

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