Introduction
Achalasia is a rare condition, of unknow causes, with an estimated annual incidence of one per 100,000 persons, characterised by a functional obstruction of the esophagus that is caused by failed relaxation of the lower esophageal sphincter (LES), in combination with absent peristalsis of the distal esophagus.1 Patients mainly present with symptoms such as dysphagia for both solids and liquids, regurgitation of undigested food, respiratory complications, chest pain and weight loss. These symptoms result from impaired peristalsis and deficient or absent relaxation of the