A total of 153 cases of early gastroesophageal junction adenocarcinoma who were planned to receive radical proximal gastrectomy from January 2003 to December 2011 were prospectively enrolled and randomly divided into two groups by table of random number according to methods of digestive tract reconstruction , including 3S anastomosis group ( 80 cases , 3S jejunal interposition ) and traditional anastomosis group ( 73 cases , esophageal remnant gastric posterior wall anastomosis ) .