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 organised oesophageal peristalsis causing impaired relaxation of the lower oesophageal sphincter, an...”
  • Bird beak sign (oesophagus) - “ The bird's beak sign of the oesophagus is used to refer to the tapering of the inferior oesophagus in achalasia. The same appearance (although it ...”

View full size version of Achalasia - with bird beak sign

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