In addition to gastroscopy, esophagoscopy, CT of the chest and abdomen, and upper abdominal tract imaging can also be performed. In case of esophageal lesions, gastroscopy can be used to confirm the diagnosis. Gastroscopy can not only examine the condition of the esophagus, but also the stomach, duodenum and other parts of the body, and if some swellings are found during the examination, some tissues can be extracted for pathological examination. Gastroscopy is a relatively comprehensive examination, so it is the one most people use regularly. In addition, other tests can also be performed on the esophagus. Esophagoscopy and gastroscopy have similarities, but there are limitations to the scope of the test. Esophagoscopy is more accurate, especially for the diagnosis of esophageal cancer. CT of the thorax and abdomen is not only diagnostic of the esophagus, but also of the heart, but not of the esophageal mucosa. In the upper gastrointestinal tract imaging, the esophagus can also be observed, which is also of preliminary significance for the diagnosis of esophageal diseases.