title: Achalasia.
authors.affiliation: Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston.
authors.forename: J W
authors.initials: JW
authors.lastname: Hill
authors.forename: S A
authors.initials: SA
authors.lastname: DeLuca
mesh_terms: D004931:Esophageal Achalasia / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000628:therapy; D004947:Esophagus / Q000000981:diagnostic imaging; D006801:Humans; D008482:Mediastinum / Q000000981:diagnostic imaging; D011859:Radiography; D014132:Trachea / Q000000981:diagnostic imaging