[Diagnosis and treatment of aneurysms of the lower segment of the vertebrobasilar system].

The authors present 20 patients with aneurysms of the vertebral artery and its branches, treated operatively. The symptomatology and the diagnostic methods in this group of rare vascular abnormalities are discussed. The authors are of the opinion, that there are no specific symptoms typical of this localization. All aneurysms of this group can be treated by suboccipital craniectomy. The results of the operation were good; in 75% the results were good or very good. 20% patients died.