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Achalasia
A rare disorder making it difficult for food and liquid to pass into the stomach.
Achalasia results from damage to nerves in the food tube (oesophagus), preventing the oesophagus from squeezing food into the stomach. It may be caused by an abnormal immune system response.
Symptoms include a backflow of food in the throat (regurgitation), chest pain and weight loss.
Achalasia can usually be managed with minimally invasive (endoscopic) therapy or surgery.