Diseases of the esophagus. Present concepts.
D004935:Esophageal Diseases / Q000000981:diagnostic imaging*; D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000033:anatomy & histology* / Q000502:physiology*; D006801:Humans; D011859:Radiography