tumor systematic approach腦腫瘤mr診斷英文版課件

tumor systematic approach腦腫瘤mr診斷英文版課件

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時間:2018-10-05

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1、BrainTumor-SystematicApproachbyRobinSmithuisandWalterMontanera河南省人民醫(yī)院放射科 高明譯講IntroductionIncidenceofCNStumorsAgedistributionTumorspreadIntra-versusExtraaxialMidlinecrossingMultifocaldiseaseCorticalbasedtumorsCTandMRCharacteristicsFat-Calcification-CystHighonT1LowonT2Dif

2、fusionweightedimagingPerfusionImagingEnhancementDifferentialdiagnosis forspecificanatomicareaSkullbaseSella/suprasellarCerebello-pontineanglePinealregionIntraventricular4thventricleTumorMimicsSchwannomalocatedinthecerebellopontineangle(CPA)withtypicalsignsofanextraaxial

3、tumorMeningiomawithabroadduralbaseandaduraltail,hyperostosisintheadjacentbone,enhanceshomogeneously,noblood-brain-barrierMelanomametastasiswithgraymatterontheanteromedialsideofthelesion(redarrow),intra-axial.Ependymomawithextensiontothecerebellopontineangle(bluearrow)an

4、dintotheforamenmagnum(redarrow)ortothecisternamagnaToassesstheextentofatumor. Anextra-axialtumorintheregionoftheleftcavernoussinuswithhomogeneousenhancementandabroadduraltail. Thisistypicalforameningioma.Actualextentofthistumorisgreaterthanexpected. Thetumorissituatedin

5、thepterygopalatinefossaandextendsintotheorbit. Italsospreadsanteriorlyintothemiddlecranialfossa.Considerationfortheeffectonthesurroundingstructures.Primarybraintumorsarederivedfrombraincellsandoftenhavelessmasseffectfortheirsizethanyouwouldexpect,duetotheirinfiltrativeg

6、rowth.Thereisnoenhancementsothiswouldprobablybealow-gradeastrocytomaTheabilityoftumorstocrossthemidlineGlioblastomamultiforme(GBM)frequentlycrossesthemidlinebyinfiltratingthewhitemattertractsofthecorpuscallosum.RadiationnecrosiscanlooklikerecurrentGBMandcansometimescros

7、sthemidline.Meningiomaisanextra-axialtumorandcanspreadalongthemeningestothecontralateralside.Lymphomaisusuallylocatednearthemidline.Epidermoidcystscancrossthemidlineviathesubarachnoidspace.MScanalsopresentasamasslesioninthecorpuscallosum.Left:MetastasesRight:Multiplemen

8、ingiomasandaschwannomainapatientwithNeurofibromatosisIIMultifocaldisease: Metastaticdisease lymphomasMulticent

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