title: Eagle syndrome presenting with external carotid artery pseudoaneurysm.
abstract: Eagle syndrome refers to a clinical syndrome caused by the abnormal elongation of the styloid process with calcification/ossification of the stylohyoid ligament. We present the first reported case of Eagle syndrome resulting in an external carotid artery (ECA) pseudoaneurysm. A patient presented to emergency room with an expanding, painful right-neck mass. CT angiography with three-dimensional volume rendering showed a bilobed 4.0-cm right ECA pseudoaneurysm and bilateral ossification of the stylohyoid ligaments with a sharpened edge of the right styloid process at the level of the carotid artery. Aneurysmectomy was performed, and a common carotid to internal carotid bypass with reversed saphenous vein restored arterial continuity. Local resection of the styloid process with a rotational sternocleidomastoid flap was performed. The pathology report was consistent with a diagnosis of a pseudoaneurysm. A six-month clinical follow-up confirmed the complete resolution of symptoms with no neurological deficits.
authors.affiliation: Department of Radiological Sciences, U.C. Irvine Medical Center, University of California-Irvine, 101 The City Drive, Orange, CA 92868, USA.
authors.forename: Anh
authors.initials: A
authors.lastname: Dao
authors.forename: Stellios
authors.initials: S
authors.lastname: Karnezis
authors.forename: John S
authors.initials: JS
authors.lastname: Lane
authors.forename: Roy M
authors.initials: RM
authors.lastname: Fujitani
authors.forename: Farhood
authors.initials: F
authors.lastname: Saremi
mesh_terms: D000328:Adult; D017541:Aneurysm, False / Q000175:diagnosis* / Q000209:etiology* / Q000473:pathology; D002342:Carotid Artery, External / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D009999:Ossification, Heterotopic / Q000150:complications* / Q000175:diagnosis*; D011859:Radiography; D013701:Temporal Bone / Q000002:abnormalities