[Cystine lithiasis in the adult. Apropos of an isolated case without familial antecedents].

We report on a case of cystinuria in an adult woman without any familial or self stone-forming history. The first symptom appeared at 43 years, as an acute renal colic caused by an obstructing ureteral calculous. Hence, this case differs from the majority in its isolated form of presentation and its uncommon age of incidence. Two clinic aspects of cystinuria are emphasized: the precocity of recurrence or stone growth without treatment, and the success obtained frequently in relapses prevention with prophylactic measures (dietary patterns, urine alkalinisation), and continued medical therapy.