[Nephrotic syndrome and anasarca status, secondary to treatment with tiopronin in a case of cystinuria]. / Síndrome nefrótico y estado de anasarca, secundario al tratamiento con tiopronina en un caso de cistinuria.

OBJECTIVE: To describe a case of cystinuria treated with tiopronin that produced the nephrotic syndrome. METHODS/RESULTS: A case of nephrotic syndrome with ascites and heart failure in a patient who had received tiopronin for the treatment of cystinuria is presented. Cystinuria as a rare cause of kidney stones is analyzed. The clinical features, diagnosis and the side effects of treatment with tiopronin are discussed. The patient recovered after withdrawal of the drug. CONCLUSIONS: It must be emphasized that patients treated with tiopronin should be screened for proteinuria.