title: Esophageal introitus (with videos).
authors.affiliation: Division of Digestive Diseases, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA.
authors.forename: Shou-jiang
authors.initials: SJ
authors.lastname: Tang
authors.affiliation: Division of Digestive Diseases, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA.
authors.forename: Ruonan
authors.initials: R
authors.lastname: Wu
mesh_terms: D003680:Deglutition Disorders / Q000209:etiology*; D004724:Endoscopy; D004935:Esophageal Diseases / Q000150:complications / Q000175:diagnosis*; D049631:Esophageal Sphincter, Upper / Q000473:pathology*; D006801:Humans