[Cystine calculi. Prevention with captopril. Clinical case]

Contribution of a case report of multiple cystine lithiasis with underlying homozygous cystinuria in a 5-year old male child. Following surgical management of the lithiasic episode the patient was followed-up with super-hydration, urine alkalinization and captopril prophylaxis. After three and a half years evolution, the patient has not developed new lithiasic episodes and maintains normal dibasic amino acids values in 24 h urine.