4 4 Nassr AN, Swann PP, Huston J III, Abdelfatah MM, Rose PS, Currier BL. Archives fur Psychiatry 1895 27:504540 An anatomical variation may predispose to iatrogenic injury even with the appropriate surgical technique. Akute Bulbaraffektion (Embolie der Arteria cerebelli post inf sinistra). J Neurosurg 1999 91(04):645-652 Its inadvertent occlusion during surgery may cause an infarction that, although volumetrically small, produces severe and disabling sequelae. Microsurgical anatomy of the extracranial-extradural origin of the posterior inferior cerebellar artery. Microsurgical anatomy of the posterior inferior cerebellar artery. 1 1 Lister JR, Rhoton AL Jr, Matsushima T, Peace DA. The posterior inferior cerebellar artery (PICA), or arteria inferior posterior cerebelli per Nomina Anatomica, usually arises from the intracranial segment (V4) of the vertebral artery and irrigates vital brain areas, especially the brain stem. O conhecimento dessa variação anatômica é essencial, pois, se confundida com um ramo muscular e coagulada, pode causar isquemia com sequelas incapacitantes.Īrtéria vertebral angiografia cerebral variação anatômica síndrome medular lateral complicações intraoperatórias Uma melhor compreensão da anatomia e suas variações permite fazer um diagnóstico topográfico preciso, bem como planejar a abordagem e a terapia cirúrgicas ideais. A revisão da literatura mostrou que os ramos anômalos do segmento cervical da artéria vertebral são infrequentes e devem ser conhecidos. Foram fornecidas breves explicações sobre a anatomia, anomalias vasculares e embriologia. Os resultados foram registrados e comparados com os de publicações anteriores. Apresentamos um caso de artéria cerebelar inferoposterior com origem anômala no segmento cervical (V3) da artéria vertebral, demonstrado por angiografia. Quando ocluída, seja por trauma ou cirurgia, pode causar infarto no tronco encefálico e no cerebelo. Apesar de ter diâmetro médio de 2 mm, usualmente irriga áreas eloquentes do encéfalo. Vertebral artery cerebral angiography anatomic variation lateral medullary syndrome intraoperative complicationsĪ artéria cerebelar inferoposterior geralmente nasce do segmento intracraniano (V4) da artéria vertebral. Knowledge of this anatomical variation is essential because, if it is mistaken for a muscle branch and coagulated, this can cause ischemia and disabling sequelae. A better understanding of anatomy and its variations enables an accurate topographic diagnosis, as well as the planning of the optimal surgical approach and therapy. A literature review showed that anomalous branches of the cervical segment of the vertebral artery are infrequent andmust be known. Brief explanations regarding anatomy, vascular anomalies and embryology were provided. The findings were recorded and compared to those of earlier publications. The present report describes a case of incidental finding of a posterior inferior cerebellar artery arising from the cervical segment (V3) of the vertebral artery, demonstrated by angiography. When occluded, whether due to trauma or surgery, it may cause infarction in the brain stem and cerebellum. Despite its mean diameter of 2 mm, it usually irrigates important areas of the brain. The posterior inferior cerebellar artery usually arises from the intracranial segment (V4) of the vertebral artery.
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