Giant vertebrobasilar aneurysms constitute a relatively uncommon subgroup of aneurysms with a high mortality rate. These aneurysms are often difficult to treat with conventional clipping or coiling because of their location and their morphology. Here we describe two patients with giant vertebrobasilar aneurysms, both of which were successfully treated with bilateral vertebral artery occlusion. This approach is suggested as a definitive treatment for vertebrobasilar aneurysms in appropriate circumstances.
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