脊髓表皮样囊肿的MR诊断

õõ:100050MRMR,18MR,4,42,24.5,2(16ö18),23,T1(6ö18)(2ö18)(10ö18)T2,T27,4,39MR,,T1T2,XTheMRfeaturesofspinalcordepidermoidsZhuMingwang,HeZhihua,ZhanJiong,etal.NeuroimagingCenter,BeijingNeurosurgicalInstitute,Beijing100050AbstractPurposeToanalyzetheMRfeaturesofspinalcordepidermoids.MaterialsandmethodsEighteenpatients(4-42yearsmean24.5)withpathologicallyprovenspinalcordepider2moidswerestudied.MRfeaturesofthesetumorswereanalyzedwithemphasisontumorlocation,signalcharacteristics,andcontrastenhancement.ResultsAllspinalcordepidermoidswerelocatedaroundtheconus.Thetumorshowedisointensity(5ö18),hyperintensity(3ö18),andheterogeneoussignalintensityonT1WI(10ö18)andmarkedhyperintenseonT2WI.Oncontrastenhancedstudies,thetumorsexhibitedminimalperipheralenhancement(4ö7)ornoenhancement(3ö7).FatsignalwasfoundonT1WIin9cases.ConclusionThespinalcordepidermoidsmostlikelyoccurredaroundtheconusregioninyoungadultpatients.ThetumortendedtoshowheterogeneoussignalintensityonT1WIandhyperintensityonT2WI,withminimalperipheralcontrastenhancement.KeywordsSpinalcordneoplasmsMagneticresonanceimagingTomography,X2raycomputed,,14÷1[1]1%,(60%),(40%)[2]18,MR,18,10,6,442,24.5,MRIT1,11T2,7Gd2DTPAMRIGESigna1.5TFonar0.3T,SE(FSE),T1:TE1630,TR400600;T2:TE85100,TR350045005mm,2mm,256256,0.1mmolökg,T1:T11,L5162,1T12L416,2(16)671ChinJRadiol,March1998,Vol32,No.3131T1,,T1,T1,()2T2,,3T1,4,54T1,T1(),T15,()6()18T1,6,2,10,9T1T2,37,,4,2040,,57.4%[1],62.5%,[1,2],,T4T8,,[3],,,,,[3],,,,,,,77119983323,,,,,:,[4,5],[2]MR,,518MR,T1,T2,,,3,,,,90%,,,MR,,[6],,,T1,T2,,,,,,MR,MR[7],,[7]MR,,,,,1Penisson2BesnierI,GuyG,GandonY.Intramedullaryepider2moidcystevaluatedbycomputedtomographicscanandmagneticresonanceimaging:casereport.Neurosurgery,1989,25:9552959.2RouxA,MercierC,LarbrisseauA,etal.Intramedullaryepi2dermoidcystsofthespinalcord.JNeurosurg.1992,76;5282533.3GuptaS,GuptaRK,GujralRB,etal.SignalintensitypatternsinintraspinaldermoidsandepidermoidsonMRimaging.ClinRadiol,1993,48:4052413.4MachidaT,AbeO,SasakiY,etal.Acquiredepidermoidtu2mourinthethoracicspinalcord.Neuroradiology,1993,35:3162318.5ToroVE,LacyC,BinetE.MRIofintrogenicspinalepidermoidtumor.JComputAssistTomogr,1993,17:9702972.6OsbornAG.Handbookofneuroradiology.StLouis:Mosby,1991.3802383.7StAmourTE,HodgeSC,LaakmanRW,etal.MRIofthespine.NewYork:RavenPress,1994.3992408.(:1997209217:1997211226)(:)871ChinJRadiol,March1998,Vol32,No.3