Esophageal cancer (EC) is a common malignant tumor of the gastrointestinal tract and originates from the epithelium of the esophageal mucosa. It has been confirmed that early esophageal cancer lesions can be cured by endoscopic therapy, and the treatment effect is equivalent to that of surgery. Upper gastrointestinal endoscopy is still the gold standard for diagnosing esophageal cancer.