Giant pseudoaneurysm of the external carotid artery causing stroke: A case report.

We report a patient in whom mechanical compression of the internal carotid artery by a giant external carotid artery pseudoaneurysm caused a stroke. This was a case of vascular Eagle syndrome due to the impingement of an elongated styloid process on the external carotid artery with subsequent dissection and formation of a pseudoaneurysm. Carotid ultrasonographic examination allowed distinguishing the pseudoaneurysm from other vascular and solid masses of the neck.