Your browser version may not work well with NCBI's Web applications. More information here...
1: J Neurosurg. 2005 Aug;103(2):356-60.Links

Subarachnoid hemorrhage caused by posterior inferior cerebellar artery aneurysm with an anomalous course of the atlantoaxial segment of the vertebral artery. Case report and review of literature.

Ashley WW Jr, Chicoine MR.

Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri 63110, USA. mchicoine@pol.net

Various anatomical courses of the vertebral artery (VA) and posterior inferior cerebellar artery (PICA) have been described. The authors present a unique case of a subarachnoid hemorrhage resulting from an aneurysm in a patient with an anatomical variation of the extracranial portion of the VA and cervical origin of the PICA. The surgical implications of this variant are discussed, and the pertinent literature reviewed. Subarachnoid hemorrhage caused by rupture of a PICA aneurysm is reported for the first time in association with a rare variation of the course of the VA.

PMID: 16175868 [PubMed - indexed for MEDLINE]