[Fraley's syndrome. A nephron-sparing laparoscopic surgical procedure. Case report].

16-year-old girl with Fraley's syndrome, which caused right flank pain and urinary infection. The radiologic exam showed a distended calyx and an infundibular obstruction caused by compression of normal renal vessels. Retroperitoneal laparoscopic calycectomy and closure of infundibulum with calyx exclusion were performed.