Achalasia x ray

Achalasia Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

X ray

• X-ray with a barium swallow, or esophagography. The patient swallows a barium solution, which fails to pass smoothly through the lower esophageal sphincter. An air-fluid margin is seen over the barium column due to the lack of peristalsis. Narrowing is observed at the level of the gastroesophageal junction ("bird's beak" or "rat tail" appearance of the lower esophagus). Esophageal dilation is present in varying degrees as the esophagus is gradually stretched by retained food. A five-minute timed barium swallow is useful to measure the effectiveness of treatment.
• Fluoroscopy can be used to demonstrate the lack of peristaltic waves in the smooth-muscle portion of the esophagus. It may also reveal ‘vigorous’ achalasia, which is characterized by random spastic contractions in the esophagus.

Classic appearance of achalasia on radiographs

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