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Laparoscopic TSME preserving left colic artery and superior rectal artery is still a technical challenging procedure. To show the feasibility of this procedure for upper rectal cancer, we conducted this study. Methods A total of 184 patients with upper rectal cancer were retrospectively collected in our cancer center between Apr 2010 and Apr 2017. These patients were treated by either laparoscopic TSME (n=46) or laparoscopic TME (n=138). In the group of TSME, left colonic artery and superiordoi:10.21203/rs.2.24464/v1 fatcat:qcpbjdmcfrfiflbh4jwh6jjga4