Nine patients (six men, three women) with extracranial vertebral artery dissection are described. Their mean age was 39.1 years (range 17-66). In four cases dissection was "spontaneous"; in the other five cases there was a history of trivial trauma. Three patients had fibromuscular dysplasia, two
Nine patients with dissections of the cervical arteries are presented. Dissections cause approximately three per cent of non-haemorrhagic stroke and are usually observed in young and middle-aged patients. Dissections very often give rise to head or neck pain. Carotid artery dissection may lead to
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