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