INTRACRANIAL ARTERIAL DISSECTION

We review the angiographic and CT findings, precipitating factors and clinical features in nine patients with ten intracranial arterial diss ections. The internal carotid artery was involved in five cases, the v ertebral artery in four and the posterior inferior cerebellar artery i n one. Angiography revealed irregular stenosis in four cases, irregula r stenosis and a pseudoaneurysm in two, irregular stenosis and irregul ar dilatation in one, arterial occlusion in two and a pseudoaneurysm i n one. CT demonstrated an infarct in four cases, a dense middle cerebr al artery in two and subarachnoid haemorrhage in one. A possible preci pitating factor was identified in five cases. Six patients recovered w ell, while three had persisting neurological deficits.