Caliber fluctuations of cervical internal carotid artery and migraine with aura: a possible vasospasm detected by ultrasonographic examinations.

Caliber fluctuations of extra- and intracranial arteries, mostly related to vasospasm, are often recognized in various neurological conditions. We report a case of a 33-year-old woman affected by migraine with and without aura who exhibited a possible cervical internal carotid artery vasospasm, detected by ultrasound, before a typical migraine aura.