“…According to the 2018 global cancer epidemiology report, esophageal cancer (ESCA) currently has the 7th highest incidence and is the 6th leading cause of mortality., while the ESCA mortality in developing countries tends to rise [1]. Although the e ciency of advanced diagnosis and multidisciplinary therapy for ESCA have demonstrated a notable improvement recently, data from the last decade showed that the 5-year overall survival (OS) rates in the US, China, and Europe are 22.0%, 20.9%, and 12.6%, respectively, and 70% of patients have missed the opportunity of undergoing radical surgery on rst diagnosis because of their late disease stage [2][3][4][5]. Related studies have shown that immunotherapy signi cantly prolong the survival of advanced gastric or gastro-oesophageal junction cancer patients (8.2 months: 7.1 months, hazard ratio (HR) = 0.78, 95% con dence interval (CI): 0.63-0.96, P = 0.0095), but in all patients with ESCA, the effective rate is only 13.1% (41/314) [6].…”