The results of pathological examination of esophageal cancer done by gastroscopy are accurate, and the diagnosis of esophageal cancer can be made by taking biopsy of esophageal tissues to determine whether there are malignant tumor cells or not under gastroscopy. Gastroscopy needs to pass through the esophagus and observe the esophageal wall in the process of examination, and after lesions are found, the tissue can be taken out for pathological biopsy through gastroscope. As long as enough specimens are taken, the diagnosis of lesions is accurate, and it can be combined with the imaging examination for comprehensive judgment of the lesion status, and standardized treatment can be carried out under the guidance of clinicians. Gastroscopy can be used for pathological examination of esophageal cancer, but if you want to examine the condition of esophageal cancer in a more detailed way, it should be combined with chest CT, barium esophageal meal, intraluminal ultrasonography and other examinations for clinical staging of esophageal cancer.