One Trocar-assisted Retroperitoneoscopic Ureteroureterostomy for Ureteral Duplication

A 12 mm transverse incision was made just above the iliac crest, followed by careful dissection of the fascia and muscle layer to expose the Gerota's fascia. Entry into the retroperitoneal space was achieved with a 10-mm balloon trocar, allowing for pneumoretroperitoneum establishment. Using a 10-mm laparoscope equipped with a Maryland dissector, the ureters were dissected and isolated, followed by careful exteriorization of both upper and lower pole moiety ureters with a Babcock grasper. The pathological upper pole moiety ureter was transected, preserving the normal lower pole moiety ureter and shared blood supply, and closed with a Vicryl 4/0 suture. Subsequently, an end-to-side ureteroureterostomy was performed with a 6/0 Polydioxanone running suture, with antegrade insertion of a double J stent if not previously conducted. A final retroperitoneoscopic evaluation ensured proper anastomosis alignment, and the incision was closed without drainage.