Beak sign of aortic dissection

Case contributed by Konstantin Benno Bräutigam
Diagnosis certain


Patient found unconscious at home. Emergency CT.

Patient Data

Age: 60 years
Gender: Female
  • Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Arterial dissection - Stanford Type A - with beak sign indicating false and true lumen.

Annotated image

Arterial dissection - Stanford Type A - with beak sign (arrows) identifying the larger false lumen. Note blunting of the acute angle due to thrombus formation (white arrows).

Case Discussion

Aortic dissection, Stanford type A. Patient went directly for surgery

This case illustrates the "beak sign", a wedge-shaped component of the false lumen. It is a reliable sign in detecting the false lumen of dissection.

In some cases (as with this case), thrombus formation may blunt the "beak".

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