Progress in oesophagoscopy.
D000328:Adult; D004935:Esophageal Diseases / Q000175:diagnosis; D004938:Esophageal Neoplasms / Q000175:diagnosis; D020701:Esophagoscopes; D004945:Esophagoscopy / Q000379:methods; D004947:Esophagus / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D011859:Radiography