Achalasia is the failure of a ring of muscle, such as the lower esophageal sphincter (LES), to relax appropriately at the moment that food arrives at the end of its journey down the esophagus. This muscular non-relaxation creates a functional obstruction, interfering with normal passage of food into the stomach. This term is most commonly used in relation to the LES, but may also be used in reference to the upper esophageal sphincter (UES) or even anus.


The Esophagus Doesn’t Like Being Stretched for Years Due to Untreated R-CPD

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Lateral dilation from R-CPD (1 of 3)

In this middle-aged patient with R-CPD (inability to burp), now fully resolved (burping well for more than a year) after botox therapy. This view is pre-treatment, at mid-esophagus using an ENT scope. No air was insufflated to get this photo; the patient “has her own.” The aortic shelf is prominent, but observe the dramatic lateral dilation (arrows). S = spine; T = trachea.

Lateral dilation in the upper esophagus (2 of 3)

Now in the upper esophagus, arrows again depict the remarkable lateral dilation.

Medial-lateral stretch (3 of 3)

Opening of the esophagus is constant, due to the patient’s retained air, but as air goes downward transiently, the lumen size is reduced, almost accentuating the medial-lateral “stretch” of the esophagus. * denotes the same place in photos 2 and 3, for reference.