Source:http://linkedlifedata.com/resource/umls/id/C0014848
MSH: A motility disorder of the ESOPHAGUS in which the LOWER ESOPHAGEAL SPHINCTER (near the CARDIA) fails to relax resulting in functional obstruction of the esophagus, and DYSPHAGIA. Achalasia is characterized by a grossly contorted and dilated esophagus (megaesophagus).,CSP: failure of normal relaxation of the lower esophageal sphincter associated with uncoordinated contractions of the thoracic esophagus, resulting in functional obstruction and difficulty swallowing.,NCI: A finding indicating the lack of adequate relaxation of the lower esophageal sphincter resulting in difficulty swallowing food.