Xanthine stone in the urinary bladder of a male child

Urinary tract calculi composed primarily of xanthine are rare both in adult s and children, We describe the clinical presentation and management of a 3 .5-year-old boy with hereditary xanthinuria (an autosomal recessive disorde r of purine metabolism) and primary bladder calculus formed from xanthine. To our knowledge this case demonstrates a previously undescribed form of xa nthinuria in childhood. Xanthine stones, although rare, should be considere d in the diagnosis of urolithiasis. Copyright (C) 2000 S. Karger AG, Basel.