Vertebrobasilar Aneurysms and Associated Arteriovenous Malformations: 54 Patients
One or two percent of patients with intracranial aneurysms also have an intracranial arteriovenous malformation (AVM) and 5–8% of the patients with an AVM also have an associated aneurysm. In the senior author’s earlier (until 1979) experience with 166 cerebral AVMs, 27 (16%) were associated with cerebral aneurysms. This high number of aneurysms might be due to selection of the patients. Recently endovascular surgeons using selective microcatheter injections find more intranidal aneurysms, and the frequency of aneurysms with AVMs has increased up to 30–40% (personal communication P. Lasjaunias). Their role in AVM bleeding is still uncertain, but they might be the site of potential rupture, and consequently this combination should possibly be treated more aggressively. These intranidal aneurysms may be arterial or venous (varices) and sometimes it is difficult to be sure which is which (personal communication A. Fox).
KeywordsArteriovenous Malformation Venous Malformation Superior Cerebellar Artery Middle Cerebral Artery Aneurysm Posterior Circulation Aneurysm
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