Video 1 - Classic achalasia.

From the following article

Esophageal motility disorders

W.G. Paterson, Raj K. Goyal and Fortunée Irene Habib

GI Motility online (2006)


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In classic achalasia, the esophagus is dilated with poor contractions. The lower esophageal sphincter remains contracted producing a bird beak appearance. Achalasia must be differentiated from other cases of narrowing at the lower end of the esophagus, like carcinoma of the esophagogastric junction and peptic strictures with scleroderma.

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