Clinical Research Directory

Inclusion Criteria: * (1) Sex unlimited, age 18-85; (2) The indication of ESD for early (superficial) esophageal squamous cell carcinoma conforms to the domestic and foreign guidelines; (3) The pathological stage of ESD was pT1a/pT1b. Exclusion Criteria: * (1) The pathological findings after ESD were HGIN; (2) Dysphagia (Stooler grade 2-4), inability to swallow cell sponge capsule successfully; (3) Postoperative pathological data were incomplete; (4) Have a history of cancer, early cancer, adenoma and other benign and malignant tumors of stomach and duodenum, combined with malignant tumors of other parts; (5) Previous esophageal or gastric surgery; (6) Esophagectomy, segmented endoscopic mucosal resection (EMR), multi ring mucosal resection (MBM) and other endoscopic non block resection techniques were used; (7) Those who have coagulation dysfunction or need to take anticoagulant and antiplatelet drugs continuously; (8) There are contraindications to gastroscopy and mucosal biopsy; (9) People with other serious diseases whose life expectancy is less than 5 years; (10) I refuse to cooperate with the research scheme and refuse to sign the informed consent form.