title: Lower esophageal ring in childhood. An unusual cause of dysphagia.
mesh_terms: D002648:Child; D003680:Deglutition Disorders / Q000209:etiology*; D004940:Esophageal Stenosis / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D009092:Mucous Membrane; D011859:Radiography; D013577:Syndrome