Spontaneous giant dissecting aneurysm of extracranial internal carotid artery

Aneurysms of the extracranial Internal Carotid Artery (ICA) are rare. Most of the cases seen are due to spontaneous or traumatic dissection of the cervical ICA. Here we report a surgically treated spontaneous extracranial ICA dissecting aneurysm in a ten-year-old girl. The aneurysm was incidentally noticed while performing a routine brain CT for the evaluation of epilepsy. The dissecting aneurysm arising from the extracranial ICA was initially diagnosed by CT, later on confirmed by Doppler and DSA. The imaging features are described with a brief review of literature.