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1、医学研究生学报2010年3月第23卷第3期JMedPostgra,Vo.l23,No.3,March,2010267论著(临床研究)桥小脑角区肿块性病变的MRI表现及其分析万水治,王中秋[摘要]目的MRI的应用对桥小脑角区肿块性病变的诊断具有重要作用。文中分析桥小脑角区肿块性病变的MRI表现,以提高桥小脑角区病变的诊断准确率,为临床治疗方案的制定提供有价值的影像信息。方法选取42例桥小脑角区肿块性病变,行MRI检查和手术病理证实,对该组病变的MRI表现和病理结果进行回顾性对照分析
2、。结果42例桥小脑角区肿瘤中,听神经瘤22例,其中16例表现为实性肿块,6例为囊实性病变,瘤体在T1WI等或稍低信号,在T2WI呈等高混杂信号,囊性部分不强化,实性部分强化;脑膜瘤7例,其中6例表现典型,瘤体在T1WI和T2WI均呈等信号,肿瘤明显均匀强化,5例可见脑膜尾征;蛛网膜囊肿2例,表现为水样信号,病变不强化;表皮样囊肿5例也表现为水样信号,但在DWI上呈高信号,增强扫描无强化。其他病变如髓母细胞瘤2例,海绵状血管瘤、星形细胞瘤、室管膜瘤、内淋巴囊乳头状肿瘤各1例,MRI表现各有特点
3、。MRI的定位准确率95.2%,正确诊断率为88%。结论MRI对桥小脑角区肿块性病变定位、诊断准确率高,但对该部位不典型病变存在误诊现象,应注意鉴别。[关键词]桥小脑角;脑;肿块;MRI[中图分类号]R816.1[文献标志码]A[文章编号]1008-8199(2010)03-0267-04AnalysisofMRIfindingsofcerebellopontineanglemass12WANShu-izhi,WANGZhong-qiu(1.DepartmentofM
4、edicalImaging,The86thHospitalofPLA,Dangtu243100,Anhui,China;2.Depart-mentofMedicalImaging,NanjingGeneralHospitalofNanjingMilitaryCommand,PLA,Nanjing210002,Jiangsu,China)[Abstract]ObjectiveMRIhasimportantvalueinthediagnosisofbraindiseases.Thisstudya
5、imedtoanalyzetheMRIfindingsofcerebellopontineanglemass(CPAM),inanattempttoimprovethediagnosticaccuracyofMRIforthislesionandprovidevaluableimaginginformationforclinicaltreatment.MethodsForty-twoCPAMpatientsunderwentMRIandpost-operativepatholog-icalexa
6、mination.TheMRIfindingsandpathologicresultswerecomparativelyanalyzed.ResultsOfthe42cases,22wereacousticneuroma,including16casesofsolidmassand6casesofcystsolidmasses,withiso-orslightlylow-intensityMRIsignalsonT1WI,iso-orslightlyhigh-intensitysignalson
7、T2WI,middleenhancementofthesolidpartandnoenhancementofthecystpartofthetumors.Sevenofthecasesweremeningioma,withiso-intensitysignalsonT1WIandT2WI,obviousenhancementofthetumors,andmeningestailsignsin5cases.Twoofthecaseswerearachnoidcyst,withcereberalspin
8、alfluidsignalsandnoenhancementofthetumor.Fiveofthecaseswereepidermoidcyst,withhypo-intensityonT1WI,hyper-intensityonT2WIandDWI,andnoenhancementonGd-DTPAenhancedT1WI.Theothersincluded2casesofmedulloblastoma,基金项目:江苏省自然科学基金(BK2008325);南京军区
