The esophagogastric (Schatzki) ring and reflux esophagitis.
D000328:Adult; D000368:Aged; D003680:Deglutition Disorders / Q000150:complications* / Q000000981:diagnostic imaging; D004381:Duodenal Ulcer / Q000150:complications; D004940:Esophageal Stenosis / Q000150:complications* / Q000000981:diagnostic imaging; D004942:Esophagitis, Peptic / Q000150:complications*; D005745:Gastric Acidity Determination; D005750:Gastric Juice / Q000032:analysis / Q000378:metabolism; D006548:Hernia, Diaphragmatic / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013577:Syndrome