Dysphagia.
D003680:Deglutition Disorders / Q000209:etiology; D004931:Esophageal Achalasia / Q000150:complications; D004935:Esophageal Diseases / Q000150:complications; D004938:Esophageal Neoplasms / Q000150:complications; D004947:Esophagus / Q000002:abnormalities; D006801:Humans; D012595:Scleroderma, Systemic / Q000150:complications; D013035:Spasm / Q000150:complications