食管贲门失弛缓症，CT扫描

d tomography (CT) scan moving from the left to the right of the chest of a 40-year-old female patient with an enlarged oesophagus (food pipe) caused by achalasia. Achalasia is a failure of smooth muscle fibres to relax. Here it is causing the lower oesophageal sphincter to remain closed, causing food to become trapped. Oesophageal achalasia can cause difficulty in swallowing, regurgitation and sometimes chest pain. It is typically a result of nerve damage, but an exact cause is not known. Treatment with drugs can relieve the symptoms