NAKAJIMA REIKO
   Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine
   Position   Assistant Professor
Article types Original article
Language English
Peer review Peer reviewed
Title Fenestrations of the intracranial vertebrobasilar system diagnosed by MR angiography.
Journal Formal name：Neuroradiology
Abbreviation：Neuroradiology
ISSN code：14321920/00283940
Domestic / ForeginForegin
Volume, Issue, Page 54(5),pp.445-50
Author and coauthor Uchino Akira, Saito Naoko, Okada Yoshitaka, Kozawa Eito, Nishi Naoko, Mizukoshi Waka, Inoue Kaiji, Nakajima Reiko, Takahashi Masahiro
Publication date 2012/05
Summary INTRODUCTION:Fenestrations of cerebral arteries are most common in the vertebrobasilar (VB) system, and magnetic resonance (MR) angiographic studies of these variations are sparse.METHODS:We retrospectively reviewed MR angiographic images of 3,327 patients; images were obtained using two 1.5-T imagers and picked up fenestrations of the intracranial vertebral artery (VA), VB junction, and basilar artery (BA) for evaluation.RESULTS:In 92 patients, we found 93 fenestrations (2.80%), which included 18 of the intracranial VA (0.54% prevalence), 6 of the VB junction (0.18%), and 69 of the BA (2.07%). Most VA fenestrations were large, and the posterior inferior cerebellar artery arose from the fenestrated segment in 10 patients (56%). Fenestrations of the VB junction were small and triangular. Sixty-five (94%) of the 69 BA fenestrations were located at the proximal segment and had small slit-like configurations. The anterior inferior cerebellar artery arose from the fenestrated segment in 27 patients (37%). We found 18 cerebral aneurysms in 16 (17%) of the 92 patients with fenestration but detected only one aneurysm at the fenestration.CONCLUSION:The overall prevalence of fenestrations of the intracranial VB system was 2.77%. We found associated cerebral aneurysms relatively frequently but rarely at the fenestration.
DOI 10.1007/s00234-011-0903-x
PMID 21732084