Achalasia is an oesophageal smooth muscle motility disorder:
Achalasia may occur at any age but particularly in the second to fifth decade of life with peak incidence between ages 30 to 60 years. Males and females are affected equally (1,2).
Annual incidence is about 1 per 100,000 and prevalence of 10 per 100,000 (1).
Chronic opioid use (COU)
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