Esophageal endoscopy.
D003680:Deglutition Disorders / Q000175:diagnosis; D004724:Endoscopy; D004935:Esophageal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004932:Esophageal and Gastric Varices / Q000175:diagnosis; D004945:Esophagoscopy; D005336:Fiber Optic Technology; D005769:Gastrointestinal Motility; D006470:Hemorrhage / Q000175:diagnosis; D006548:Hernia, Diaphragmatic / Q000175:diagnosis; D006801:Humans; D011859:Radiography