Case report: laparoscopic pyeloplasty with pyelolithotomy in crossed fused ectopia.

An 8-year-old boy with right flank pain was found on ultrasonography and intravenous urography to have hydronephrosis secondary to ureteropelvic junction obstruction with calculi in the lower pole of the right kidney and a fusion anomaly. Transperitoneal laparoscopic dismembered pyeloplasty and removal of calculi was carried out. The patient had uneventful recovery and is doing well at 6 months' follow-up. To our knowledge, this is the first reported case of laparoscopic pyeloplasty with pyelolithotomy in crossed fused ectopic kidneys in the pediatric population.