Abstract
Introduction: Extracranial carotid artery dissections and pseudoaneurysms are much more common than intracranial ones, and often extend to the level of the foramen lacerum. Involvement of cranial nerve XII from extracranial dissection and pseudoaneurysm is frequent, followed by IX, X, XI, V, VII, VI, III (in order of frequency). These aneurysms have a myriad of clinical presentations, and may result in thrombosis, embolization, compression of adjacent structures, and rupture. We report a case of extracranial carotid artery dissection with a unique clinical course of evolving radiographic findings from a tongue mass to a later-diagnosed pseudoaneurysm.
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