Anterior spinal and bulbar artery supply to the posterior inferior cerebellar artery revealed by a ruptured aneurysm: case report

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The posterior inferior cerebellar artery (PICA) is a vessel located between the intra- and extracranial circulation. The artery is characterized by a complex embryological development and numerous anatomical variants. The authors present a case of the PICA supplied by both a hypertrophic anterior spinal artery and a hypoplastic bulbar artery. This unusual arrangement somehow completes the list of previously published variants, and the spontaneous rupture of a related aneurysm confirmed the fragility of this network. The authors discuss anatomical and treatment considerations.

ABBREVIATIONSAICA = anterior inferior cerebellar artery; ASA = anterior spinal artery; DSA = digital subtraction angiography; LSA = lateral spinal artery; PICA = posterior inferior cerebellar artery.
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INCLUDE WHEN CITING Published online April 1, 2016; DOI: 10.3171/2016.1.JNS152099.CorrespondenceJoseph Gabrieli, Department of Neuroradiology, Pitié-Salpêtrière Hospital, 47 Bd de l'Hôpital, Paris 75013, France. email: joseph.gabrieli.inr@gmail.com.
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