永存三叉动脉为后下小脑动脉半球支供血：一种罕见的解剖变异。
Persistent trigeminal artery feeding a hemispheric branch of the posterior inferior cerebellar artery: a rare anatomic variant.
机构信息
Department of radiology, Rouen university hospital, 1, rue de Germont, 76000 Rouen, France.
出版信息
J Neuroradiol. 2011 Oct;38(4):251-4. doi: 10.1016/j.neurad.2011.02.006. Epub 2011 Apr 13.
Persistent trigeminal artery is a rare persistent carotid-basilar anastomosis that usually connect the infracavernous segment of the ICA with the basilar artery. Rarely, PTA may feed cerebellar artery. We describe an exceptional case of PTA terminating in postero-inferior cerebellar artery (PICA) hemispheric branch. Angiographic and CTA features are presented and hypotheses regarding developmental origin of this variation are discussed.
永存三叉动脉是一种罕见的颈内动脉-基底动脉吻合异常，通常连接颈内动脉的海绵窦段与基底动脉。极罕见情况下，永存三叉动脉可供应小脑后下动脉。我们描述了一例永存三叉动脉终末于小脑后下动脉（PICA）半球支的特殊病例。本文呈现了该病例的血管造影和 CTA 特征，并讨论了这种变异的发育起源假说。
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