[Examination by the esophagoscope--pertinent use of the rigid esophagoscope and flexible esophagoscope].
D004936:Diverticulum, Esophageal / Q000175:diagnosis; D004938:Esophageal Neoplasms / Q000175:diagnosis; D004940:Esophageal Stenosis / Q000175:diagnosis; D020701:Esophagoscopes; D005336:Fiber Optic Technology; D006801:Humans