Causes of achalasia: Achalasia often means absent peristalsis in the esophagus & incomplete relaxation of the lower esophageal sphincter (les). It may be a "primary" esophageal motility disorder, or "secondary" to cancers invading the les (pseudoachalasia), Chagas disease from reduviid bug bites, amyloidosis, sarcoidosis, eosinophilic infiltration. Similar motor abnormalities can be seen with diabetes & CIIP.
Answered 6/13/2017
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