title: Cystine calcium bladder calculus in a 2-year-old child.
abstract: We report on a 2-year-old child who presented with urinary tract infection and a large solitary bladder calculus. Dietary history indicated an intake of 2 gm. calcium with supplemental vitamin D daily. Urinary amino acid analysis revealed cystinuria. The high dietary intake of calcium and vitamin D may have precipitated early cystine calcium stone formation.
mesh_terms: D002136:Calcium, Dietary / Q000009:adverse effects*; D002675:Child, Preschool; D003555:Cystinuria / Q000150:complications* / Q000188:drug therapy; D005260:Female; D006801:Humans; D001744:Urinary Bladder Calculi / Q000139:chemically induced* / Q000150:complications*; D014807:Vitamin D / Q000009:adverse effects
chemical_list: D002136:Calcium, Dietary; D014807:Vitamin D