Objective:To summarize the technical modification and experiences of transumbilical laparoendoscopic single-site nephrectomy(LESS-N) by homemade device.Methods: The clinical data of LESS nephrectomy performed from June 2010 to April 2013 in Peking University Third Hospital were analyzed retrospectively.All the cases were divided into two groups according to the technique method and operative date.Group 1 included 10 cases that underwent LESS radical nephrectomy and 2 that received LESS simple nephrectomy fr...