Presented by Nguyen Thanh Liem, MD, PhD, during the 2013 IPEG Annual Meeting. S013 ONE-TROCAR-ASSISTED PYELOPLASTY Nguyen Thanh Liem, MD, PhD, Nguyen Thi Mai Thuy, MD, Le Anh Dung, MD, Nguyen Duy Viet, MD, National Hospital of Pediarics