Carotid and Vertebral artery Dissection:

Carotid and Vertebral artery Dissection - Arterial injury may accompany skull base or vertebral fractures - ICA mist commonly injured at sites of fixation: -- enternce to carotid canal at base of petrous bone -- exit from cavernous sinus below anterior clionoid process, where it becomes intradural MRA findings: - Intramural hematoma: high intraluminal signal on T1W fat suppression; - Dissection: Intimal flap; - Occlusion: abscence or loss of normal flow void