The Application of Fluorescence Laparoscopy in the Treatment of Adenocarcinoma of the Esophagogastric Junction

Inclusion Criteria: \- 1. All cases should be diagnosed as adenocarcinoma of the esophagogastric junctionncer by histology. The tumor is within 1 cm above or 2 cm below the anatomic cardia. The clinical stage is T1-3, Nx, M0 for gastric cancer which can undergo the laparoscopic surgery. 2\. Eastern Cooperative Oncology Group (ECOG) scale 0-2 3. Heart, lung, liver, and kidney function can tolerate operation 4. Patients and their families are able to understand and be willing to participate in this clinical study and to sign informed consent. Exclusion Criteria: 1\. history of stomach malignant disease 2. recent diagnosis of other malignant tumors (except for papillary carcinoma of the thyroid gland and basal cell carcinoma of the skin) 3. patients with obstruction, perforation, bleeding requiring emergency surgery 4. a history of abdominal surgery (which makes it difficult to perform laparoscopic procedures), severe systemic disease such as diabetes, severe chronic lung disease, cirrhosis, other malignant diseases 5. combined stomach multiple carcinomas 6. with a history of serious mental illness 7. pregnant or lactating women 8. The researchers believe that the patients are unsuitable to participate in the researchers with other cases. \-