Efficacy of captopril therapy in cystinuria lithiasis. A case report

Area of Science:

• Pediatric Nephrology
• Medical Genetics
• Urology

Background:

• Cystinuria is a rare inherited metabolic disorder characterized by excessive cystine excretion in urine.
• This leads to the formation of cystine urolithiasis, causing severe kidney and bladder stones.
• Management typically involves hydration, urine alkalinization, and sometimes chelating agents.

Observation:

• A 7-year-old girl presented with severe urolithiasis attributed to cystinuria.
• Following surgical intervention for stone removal, a medical regimen was initiated.
• The treatment included intensive hydration, urine alkalinization, and captopril.

Findings:

• Captopril demonstrated significant therapeutic efficacy in resolving existing lithiasis.
• The medication also proved effective in preventing the formation of new urinary stones.
• This suggests a dual role for captopril in managing cystine urolithiasis.

Implications:

• Captopril may be a valuable therapeutic option for pediatric patients with cystinuria-related urolithiasis.
• This approach could reduce recurrence rates and improve long-term outcomes.
• Further research into captopril's mechanism in cystine stone prevention is warranted.