Formation of a calcium oxalate urethral stone in a 3-year-old boy due to hypocitraturia.

Abstract

INTRODUCTION:

Urolithiasis in children is often due to metabolic abnormalities (e.g. hypocitraturia) and hence recurs frequently.

CASE PRESENTATION:

A 3-year-old boy presented with gross hematuria. Computed tomography detected a urethral calculus. The calculus was removed surgically. The stone was composed of calcium oxalate. Although oxalate and uric acid levels in the urine were within normal ranges, urine calcium was moderately elevated and urine citrate was substantially low. Urinalyses of the parents revealed that the father had acidic hypocitraturic urine, containing oxalate crystals, and the mother had hypercalciuria. Administration of oral citrate acid normalized urine citrate levels and eliminated the oxalate crystals, from the boy and his father.

CONCLUSION:

Although preventing urolithiasis using oral citrate is common in the adult population, this preventive measure is not well recognized in children, thus warranting further study.

• Authors: Nobuhisa Kita, Yoshiro Nagao, Yoshiyuki Nabeshima, Ichiro Yamane, Masaaki Hirata, Kuniya Hatakeyama
• Journal: IJU case reports (IJU Case Rep) Vol. 3 Issue 2 Pg. 49-52 (Mar 2020) ISSN: 2577-171X [Electronic] Australia
• PMID: 32743468 (Publication Type: Case Reports)
• Copyright: © 2020 The Authors. IJU Case Reports published by John Wiley & Sons Australia, Ltd on behalf of the Japanese Urological Association.