Achalasia Esophageal Disorders

Achalasia is a rare disorder of the smooth muscle layer of the esophagus in which muscular ability to move food down the esophagus (peristalsis) is impaired, and the entry to the stomach, the lower esophageal sphincter (LES), fails to relax properly in response to swallowing. Achalasia has no known underlying cause, although it can be mimicked by other conditions, such as esophageal cancer or Chagas disease.