Crescent sign of arterial dissection

Last revised by Dr Joshua Yap on 23 Jul 2022

The crescent sign refers to the high signal crescent seen in the wall of a vessel when dissected. This may be seen both on T1 or T2 sequences depending on the age of the blood (see aging blood on MRI). It is classically referred to in internal carotid artery dissection.

It should not be confused with other radiological crescents, including:

See also

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Cases and figures

  • Photograph : moon crescent
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  • Case 1
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