title: Schatzki ring, epithelial junction, and hiatal hernia--an unresolved controversy.
mesh_terms: D004848:Epithelium / Q000473:pathology; D004940:Esophageal Stenosis / Q000175:diagnosis*; D004943:Esophagogastric Junction / Q000473:pathology*; D004947:Esophagus / Q000473:pathology; D006548:Hernia, Diaphragmatic / Q000175:diagnosis*; D006551:Hernia, Hiatal / Q000175:diagnosis*; D006801:Humans