Artery, Anterior Communicating

The anterior communicating artery connects the bilateral anterior cerebral arteries and is the most common location of intracranial aneurysms.


This patient was referred due to an incidentally found 2-3 mm ACOM aneurysm on a CTA during the workup for dizziness. Interestingly, DSA revealed a fenestration of the ACOM artery.

(A): Coronal CTA of the head, thick-cut.
(B): PA view of the ACOM fenestration, early arterial phase.
(C): PA view of the ACOM fenestration, arterial phase. Note the disappearance of the left A1 and contrast dilution in the left A2.
(D and E): 3D reconstruction of the ACOM anatomy.