ナカジマ　レイコ   NAKAJIMA REIKO   中島　怜子    所属   医学部 医学科（東京女子医科大学病院）    職種   助教
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Vertebral artery variations at the C1-2 level diagnosed by magnetic resonance angiography.
掲載誌名	正式名：Neuroradiology 略　 称：Neuroradiology ISSNコード：14321920/00283940
掲載区分	国外
巻・号・頁	54(1),pp.19-23
著者・共著者	Uchino Akira, Saito Naoko, Watadani Takeyuki, Okada Yoshitaka, Kozawa Eito, Nishi Naoko, Mizukoshi Waka, Inoue Kaiji, Nakajima Reiko, Takahashi Masahiro
発行年月	2012/01
概要	INTRODUCTION:The craniovertebral junction is clinically important. The vertebral artery (VA) in its several variations runs within this area. We report the prevalence of these VA variations on magnetic resonance angiography (MRA).METHODS:We retrospectively reviewed MRA images, obtained using two 1.5-T imagers, of 2,739 patients, and paid special attention to the course and branching of the VA at the level of the C1-2 vertebral bodies.RESULTS:There were three types of VA variation at the C1-2 level: (1) persistent first intersegmental artery (FIA), (2) VA fenestration, and (3) posterior inferior cerebellar artery (PICA) originating from the C1/2 level. The overall prevalence of these three variations was 5.0%. There was no laterality in frequency, but we found female predominance (P < 0.05). We most frequently observed the persistent FIA (3.2%), which was sometimes bilateral. We found VA fenestration (0.9%) and PICA of C1/2 origin (1.1%) with almost equal frequency. Two PICAs of C1/2 origin had no normal VA branch.CONCLUSIONS:We frequently observed VA variations at the C1-2 level and with female predominance. The persistent FIA was most prevalent and sometimes seen bilaterally. Preoperative identification of these variations in VA is necessary to avoid complications during surgery at the craniovertebral junction.
DOI	10.1007/s00234-011-0849-z
PMID	21340577