Aplastic A1 on MRA

Case contributed by Craig Hacking
Diagnosis certain
mri
This study is a stack
Axial
MRA
This study is a stack
3D rotational
MIPs
This study is a stack
3D rotational
MIPs
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Info

Aplastic right A1.

Case Discussion

Nice example of a common variant of the circle of willis where the right A1 is tiny and the right A2 is supplied by a large Acom.

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