Abstract:Objective To investigate the effect of different time intervals on the clinicopathological data and prognosis of additional surgery for non-curative endoscopic resection of adenocarcinoma of esophagogastric junction (AEGJ), then determine the optimal timing from endoscopic submucosal dissection (ESD) to additional surgery.Methods A retrospective cohort study method was used. Follow-up data of 237 patients initially diagnosed with early cancer and precancerous lesions of esophagogastric junction who underwent ESD from January 2012 to February 2019 were analyzed. Finally, 42 patients (17.72%, including 34 cases of non-curative resection and 8 cases of curative resection) with AEGJ with continuous follow-up who underwent additional surgery after endoscopic resection were included in this study. According to the time interval from ESD to additional surgery, they were divided into 3 groups, namely the early group with 18 cases (4 weeks ≤ N < 8 weeks), the intermediate group with 13 cases (8 weeks ≤ N < 12 weeks) and the late group 11 cases (N ≥ 12 weeks). The follow-up time was (47.21 ± 13.23) months, and clinicopathological data and oncological results were compared among the three groups by retrospective analysis.Results There was no significant difference in general data among the three groups after ESD (P > 0.05). There was no significant difference in surgical clinical medical records among the three groups, such as operation time, abdominal adhesion, intraoperative bleeding, the number of lymph node dissections, the first postoperative anal exhaust time, the first postoperative water inflow time, the first postoperative eating time, postoperative hospital stay, and the incidence of postoperative complications (P > 0.05). Survival analysis showed that 3-year recurrence free survival (RFS) in the late group was less than that in the early group (70.00% and 88.20%), but there was no significant difference (P > 0.05), there was also no significant difference in the 3-year overall survival (OS) among the three groups during the follow-up period (P > 0.05).Conclusion Early intervention after non-curative endoscopic resection is recommended (with additional surgery within 4 to 8 weeks), which can achieve a better prognosis without affecting the surgical safety and effectiveness of adenocarcinoma of gastroesophageal junction.