Achalasia, also known as esophageal achalasia, achalasia cardiae, cardiospasm, and esophageal aperistalsis is a disorder of the esophagus in which the nerves and muscles do not work properly, causing swallowing difficulties, sometimes chest pain, regurgitation and its consequent coughing and breathing problems if food gets into the lungs. There may also be chest pain. It is an esophageal motility disorder There is a weakness in the lower part of the esophagus (smooth muscle), and the lower esophageal sphincter does not open and let food pass through
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