Beak sign (arterial dissection)

The beak sign of arterial dissection represents a wedge of haematoma at the distal end of the false lumen. It is here that false lumen propagation is occurring. It manifests as an acute angle between the dissection flap and the outer wall. It may be filled with contrast-enhanced blood (high attenuation) or thrombus (low attenuation).


The term bird's beak sign is used in a number of other contexts: see bird beak sign (disambiguation)

Inspired signs
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Article information

rID: 8928
System: Vascular
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:

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Cases and figures

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