Asymptomatic right internal carotid artery pseudoaneurysm and Eagle's syndrome

Abstract

A healthy 21-year-old man presented with a right neck palpable mass and calcifications diagnosed during a Panorex odontologic study. Computed tomography angiography imaging of the neck demonstrated a right common and internal carotid artery (ICA) pseudoaneurysm with irregular thrombus and calcifications causing severe right ICA stenosis (A, B). An elongated styloid process was identified adjacent to the pseudoaneurysm associated with ossification of the stylohyoid ligaments (C/Cover). A diagnosis of stylocarotid artery syndrome, a subtype of Eagle's syndrome, was considered and operative treatment recommended, given the pseudoaneurysm appearance with large thrombus and stenosis of the ICA.