Department of Thoracic Surgery Affiliated Hospital of Chengdu University Chengdu 610081 Sichuan Province ChinaDepartment of Thoracic Surgery The First Affiliated Hospital of Soochow University Suzhou 215006 Jiangsu Province China;
West China Second University Hospital Sichuan University Chengdu 610041 Sichuan Province China;
Department of Thoracic Surgery West China Hospital Chengdu 610041 Sichuan Province China;
Department of Thoracic Surgery West China Hospital Chengdu 610041 Sichuan Province China;
Department of Thoracic Surgery The First Affiliated Hospital of Soochow University Suzhou 215006 Jiangsu Province China;
Signet ring cells; Esophageal and esophagogastric junction adenocarcinoma; Clinicopathological characteristics; Prognosis; Systematic review; Meta-analysis;