Aneurysms of the Posterior Cervicocranial Circulation: Clinical and Angiographic Considerations

I MPROVED techniques 1,7'17'2~ and new contrast media s,14 ,2~ .2~ have extended the horizons of cerebral angiography and made possible complete visualization of the vertebrobasilar system. The published reports of saccular aneurysms of the posterior fossa are principally from necropsy nlaterial or from a combination of cases identified either angiographically or at postmortem (Table 1). We are reporting s cases of aneurysms of the posterior fossa, each diagnosed anglographically.