RAPID DEVELOPMENT OF GIANT FUSIFORM CEREBRAL ANEURYSMS IN ANGIOGRAPHICALLY NORMAL VESSELS

Several reports have mentioned formation of new saccular aneurysms in previously normal-appearing vessels, but de novo fusiform aneurysms ha ve not been reported. We describe three children who initially present ed with giant fusiform aneurysms involving the cervical and petrous po rtions of the internal carotid artery and were treated with balloon oc clusion. Between 2 and 6 years later, they were found to have new gian t fusiform aneurysms in the vertebrobasilar system.