IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Long terminal internal carotid artery mimicking an aneurysm

Case contributed by Craig Hacking
Diagnosis certain

Presentation

Incidental right ICA aneurysm on CT brain.

Patient Data

Age: 70-75 years
Gender: Male

The right internal ICA is longer than the left, extending more superiorly into the sylvian fissure which mimics an aneurysm. No aneurysm or infundibulum is evident.

No other aneurysm identified. Left fetal P-comm.

No restricted diffusion. The remainder of the study is unremarkable.

Case Discussion

Here the terminal right ICA is abnormally long and higher than usually, representing an anatomic variant. You can understand how it was mistaken on a non contrast CT and even the T2 MRI as an aneurysm.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.