Cystinuria

Cystinuria (cystinosis; cystinoz) is a group of hereditary disorders of the metabolism of the amino acid cystine. In 90% of cases it is a sporadic disease and in other cases it is inherited. Cystine reduces the solubility of uric acid crystals and increases their size, so it does not dissolve in urine. A lot of cystine and its urate salts are found in urine,