[Urolithiasis and ureteropelvic junction obstruction].

The review of the literature about ureteropelvic junction (UPJ) obstruction and concomitant renal stone has highlighted two major aspects. First, urinary stagnation due to UPJ obstruction is frequently associated with metabolic disorders such as hypercalciuria. Second, results of laparoscopic pyeloplasty are at least as good as those of open surgery but with the advantages of a minimal access approach. Exploration of the renal cavity with the laparoscope or a fibroscope allows to treat in the same time a concomitant renal calculi.