Normal value of esophagography

(1) dysphagia or discomfort. (2) Foreign body, rupture and perforation of esophagus. (3) Clarify the nature, location and scope of esophageal tumor. (4) To know whether patients with portal hypertension have esophageal varices. (5) Congenital esophageal diseases. (6) Understand the oppression of esophagus caused by mediastinal tumor and cardiovascular disease.