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Efficacy of pneumatic dilation for achalasia

Efficacy of pneumatic dilation for achalasia
Barium radiographs showing the result of pneumatic dilation of the lower esophageal sphincter in a patient with achalasia. Left panel: The balloon is positioned in the lower esophageal sphincter with an hourglass "waist" effect (arrow) caused by the hypertensive sphincter. Right panel: The waist disappears as the dilation progresses.
Adapted from the American Gastroenterological Association©. This slide cannot be downloaded but may be purchased as part of a set from the AGA.
Graphic 70627 Version 3.0

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