Modality: Fluoroscopy

- “ Achalasia can be divided into primary and secondary (pseudoachalasia): primary achalasia is a smooth muscle motility disorder of the esophagus. ...”

Used in the following article:

  • Achalasia - “ Achalasia (primary achalasia) is a failure of organized esophageal peristalsis causing impaired relaxation of the lower esophageal sphincter, and ...”
  • Bird beak sign (esophagus) - “ The bird's beak sign of the esophagus is used to refer to the tapering of the inferior esophagus in achalasia. The same appearance (although it is...”

View full size version of Achalasia - with bird beak sign

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