[A metabolic approach to patients with calculi].

Metabolic evaluation remains cornerstones in the treatment and prevention of recurrence in patients with urolithiasis. The various chrystallographic, biological and radiological investigation should be done only in patients presenting recurrence and/or given risks factor of recurrences. The choice of the investigation is guided by the knowledge of the pathophysiological phenomena and should thus be adapted to each patient. Results should be analyzed by a multidisciplinary team. This aspect will be developed in the next paragraph.