Objective: To compare various data of open pyeloplasty,laparoscopic pyeloplasty and endopyelotomy as a treatment of ureteropelvic junction obstruction( UPJO),and to investigate and discuss the feasibility and effect of the three methods. Methods: In the study,109 cases of UPJO treated by different surgical approaches in Peking University People's Hospital from January 2004 to December 2014 were retrospectively investigated. The patients were divided into three groups according to the treatment they received...