摘要
目的：探讨颅底凹陷症的病理机制。材料和方法：应用ＣＴ对６０例颅底凹陷症及１００例正常人进行前瞻性研究，双盲法阅片。结果：病变组６０例均示延、颈髓屈曲后弓，４６例齿状突与脑干间显示蛛网膜下腔，５６例脑干后缘与小脑扁桃体相互挤压变形。病变组２０例行脑池造影ＣＴ检查，均示齿状突与斜坡下缘相交处蛛网膜下腔宽于斜坡上部，延、颈髓屈曲后弓，１８例延脑后部显示小脑扁桃体压迹，其中延脑与小脑扁桃体间蛛网膜下腔变窄者６例，消失者１２例。结论：延、颈髓屈曲后弓并与小脑扁桃体相互挤压是颅底凹陷症的主要病理改变。
Purpose:Toinvestigateonthemechanismofbasilarimpression.Materialsandmeth-ods:Theradiographsofpatientswithbasilarimpressionand100normalpersonswerestudiedbydoubleblindmethod.Results:Over-bendingofthemedulaoblongataandcervicalcordwerefoundinal60patients.Subarachnoidspacewasvisualizedbetwendensandmedulaoblongatain46pa-tients.Distortionandmutualcompresionbetweenthemedulaandcerebelartonsilwerefoundin56patients.Thesubarachnoidspaceattheden-clivusjunctionwaswiderthanupperclivusinalpatients(n=20)examinedwithCTM.Conclusion:Theauthorssuggestedthatthemainmechanismofbasi-larimpressionmightbeover-bendingofmedulaoblongataandcervicalcord,andmutualcompresionwithcerebelartonsil.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1996年第6期389-391,共3页
Chinese Journal of Radiology
关键词
颅底凹陷症
CT
病理学
ForamenmagnumAbnormalitiesAtlanto-axialjointTomography,X-raycomputed
