Presentation
Routine follow-up post chemotherapy.
Patient Data

Saccular aneurysm arising from the internal carotid artery in the neck with partial thrombosis.





Larger saccular aneurysm projecting anteriorly from the extracranial segment of the left internal carotid artery at the level of C1-2.









DSA demonstrates the saccular aneurysm arising from the internal carotid artery. No intracranial aneurysm identified.
Case Discussion
Extracranial internal carotid artery aneurysms in the neck are much less common than intracranial aneurysms. This aneurysm was detected incidentally during staging imaging. There was no history to suggest this is a pseudoaneurysm and was presumed to be a true aneurysm.