脑垂体解剖与病变

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1、......TheRadiologyAssistantHomeAbdomenBreastCardiovascularChestHeadNeckMusculoskeletalPediatricsNeuroradiologyMiscellaneousCasesTopSitesNewsletterSellaTurcicaandParasellarRegionbyWalterKucharczykandMariekeHazewinkelRadiologydepartmentoftheUniversityofToronto,CanadaandtheR

2、adiologydepartmenttheMedicalCentreAlkmaar,theNetherlands·AnatomicApproachtoDifferentialDiagnosis·PituitaryMicroadenoma·PituitaryMacroadenoma·RathkeCleftCyst·Craniopharyngioma·Meningioma·Aneurysm·AneurysmvsMeningioma·Hamartoma·HypothalamicandChiasmGlioma·Germinoma·Chordoma

3、·Metastasesbacktooverview   printPublicationdate:10-8-2008ThisreviewisbasedonapresentationgivenbyWalterKucharczykaandwasadaptedfortheRadiologyAssistantbyMariekeHazewinkel.Inthisreviewasystematicanatomicapproachtodifferentialdiagnosisofasellarorparasellarmassisdescribed.By

4、clickingononeofthesubjectsinthelistontheleft,youwillgodirectlytothisitem.Ifyouhaveprintingproblemswiththemarginsofthedocument,youmayhavetoadjustthemarginsinthepagesetupofyourinternetbrowser,whichyouwillfindinthetopleftofthemenubar. AnatomicApproachtoDifferentialDiagnosisI

5、nordertoanalyzeasellarorparasellarmassonMRIweusethefollowinganatomicapproach:1.Firstidentifythepituitaryglandandsellaturcica.2.Thendeterminetheepicenterofthelesionandwhetheritisinthesellaorabove,beloworlateraltothesella.3.Ifitisinthesella,determinewhetherornotthesellaisen

6、larged.4.Oncethelocationofthemassisclear,analyzethesignalintensitypatterns:isthelesioncysticorsolid?5.Doesitcontainanyabnormalvessels?6.Arethereanycalcifications?Andsoon.7.FinallyestablishaDifferentialDiagnosis.PituitaryglandOnacoronalsectionthroughthebrainthereferencestr

7、uctureisthepituitaryglandwhichliesinthesellaturcica.Itisusuallylargerinfemalesthaninmales-infemalesthesuperiorbordertendstobeconvex,whereasinmalesitisusuallyconcave.Themostcommonabnormalitiesthatariseinthepituitaryglandarepituitaryadenoma,Rathke'scleftcystandcraniopharyng

8、ioma.学习好帮手......PituitarystalkThenextstructuretoidentifyisthepituitarystalk.Thisisaverticallyori