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Radiopaque 2,8-dihydroxyadenine lithiasis.

T Yagisawa1, Y Yamazaki, H Toma

  • 1Department of Urology, Tokyo Women's Medical College, Japan.

International Urology and Nephrology
|September 11, 1999
PubMed
Summary

2,8-Dihydroxyadenine (DHA) lithiasis, caused by APRT deficiency, is a rare urinary stone disease. This case highlights a radiopaque DHA stone, challenging previous assumptions about its radiological appearance.

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Area of Science:

  • Nephrology
  • Urology
  • Biochemistry

Background:

  • 2,8-Dihydroxyadenine (DHA) lithiasis is a rare genetic condition resulting from adenine phosphoribosyltransferase (APRT) deficiency.
  • Accurate identification of DHA stones is crucial for effective medical management.
  • Previous literature suggests DHA stones are radiolucent, similar to uric acid stones.

Observation:

  • This report details a unique case of a radiopaque 2,8-DHA urinary stone.
  • The stone's radiopacity contradicts established radiological characteristics of DHA lithiasis.

Findings:

  • The case demonstrates that 2,8-DHA stones can exhibit radiopacity, not solely radiolucency.
  • This finding challenges the conventional radiological classification of DHA stones.

Implications:

  • Urinary stone composition requires thorough investigation regardless of presumed radiological findings.
  • This case underscores the importance of biochemical analysis for definitive stone diagnosis and tailored medical treatment.
  • Revising diagnostic protocols may be necessary to account for variable radiological presentations of DHA stones.

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