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  • Title: Persistent carotid-vertebrobasilar anastomoses: how and why differentiating them?
    Author: Pasco A, Papon X, Bracard S, Tanguy JY, Ter Minassian A, Mercier P.
    Journal: J Neuroradiol; 2004 Dec; 31(5):391-6. PubMed ID: 15687958.
    Abstract:
    The persistent carotid-vertebrobasilar anastomoses (PCVBA) can be explained by an interruption of the vertebrobasilar system (VBS) embryogenesis. We present two very rare cases of persistent anastomoses: a hypoglossal artery and a type I proatlantal artery, insisting on the angiographic criteria allowing differentiation. After a brief review of the embryogenesis of the VBS, we describe the different types of persistent anastomoses (hypoglossal, type I and II proatlantal, trigeminal and otic arteries). We will insist on the potential risks, not well-known, but typical of each anastomosis. PCVBA usually are incidental findings but imaging follow-up may be required since aneurysms may develop.
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