Achalasia

Achalasia is a rare esophageal motility disorder in which the muscles do not contract properly and the lower esophageal sphincter does not relax during swallowing. The result is accumulation of food in the esophagus, regurgitation, chest pain, and weight loss. Diagnosis is performed using esophageal manometry and barium swallow. Treatment includes pneumatic dilation of the sphincter,  toxin injection, or surgical procedures such as POEM or Heller myotomy.