胼胝体发育不全合并脂肪瘤的CT和MRI诊断.doc

《胼胝体发育不全合并脂肪瘤的CT和MRI诊断.doc》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、胼胝体发育不全合并脂肪瘤的CT和MRI诊断作者：万梦楠许崇永郑显秋曾庆娟方必东周胜法【摘要】目的探讨胼胝体发育不全合并脂肪瘤的CT和MRI征象，以提高对本病的认识。方法回顾性分析胼胝体发育不全合并脂肪瘤30例的临床、CT及MRI表现。结果胼胝体发育不全CT及MRI表现为双侧脑室体部平直、分离，纵裂池增宽间距加大18例，正常弧线消失12例；第三脑室扩大上移至侧脑室之间20例，上抬至大脑纵裂10例，侧脑室三角区与后角明显扩大6例，轻度扩大12例；MRI矢状位示胼胝体体积缩小，发育不全或缺如。合并脂肪瘤CT表现为侧脑室间条带状低密度（CT值-43Hu～-80Hu），边缘见对称性弧形钙

2、化10例，MRI表现为短T1中长T2和高质子密度信号，在各序列上均与脂肪组织信号同步。结论本病在CT和MRI上具有特征性表现，CT与MRI相结合可提高诊断准确率；MRI具有多维成像能力，优于CT检查。【关键词】胼胝体发育不全脂肪瘤磁共振成像计算机体层摄影术　　【Abstract】ObjectiveTostudyCTandMRIfeaturesofdysplasiaofcorpuscallosum(DCC)complicatinglipomaandtoimprovetheknowledgementofit.Methods30caseswithDCCcomplicatinglipo

3、mawereincludedinthestudy.TheCTandMRIappearancesofitwereevaluatedretrospectively.ResultsTheCTandMRIappearanceswereflattenedandseparatedbodiesofbothlateralventricles,enlargedcerebrallongitudinalfissurein18patients,disappearanceofnormalcurvaturein12cases.Thethirdventriclewasdilatedandelevatedin

4、tothelateralventriclesin20casesandintothecerebrallongitudinalfissurein10cases.Therewereobviouslyenlargedtriangularregionandbackhornsofbothlateralventriclesin6cases,slightlyenlargedonesin12cases.MRIdemonstratedreduction,dysplasiaandabsenceofcorpuscallosum.TheCTappearanceswerelowdensityfoci(CT

5、valuefrom-43Huto-80Hu)andsymmetricalcurvedcalcificationintheedgesoflateralventriclesin10casescomplicatingwithlipoma.TheMRIfindingsshowedhighsignalonT1WI,mediateonT2WIandhighprotondensitysignal.TheywereconsistentwithfattissueoneachMRIsequence.ConclusionsAlthoughCTandMRIbothhavecharacteristici

6、magesinfordiagnosingDCCcomplicatinglipoma,CTcombiningwithMRIcanimprovethediagnosticrate,andMRIwithmultipledimensionalimagingissuperiortoCTinthediagnosisofthiskindofdisease.4　　【Keywords】CorpuscallosumAbnormalityLipomaMRIX-raycomputedtomography　　胼胝体发育不全（dysplasiaofcorpuscallosum，DCC）是一种胚胎性病变，可

7、单独存在，也可合并Dandy-Walker综合征、Arnold-ChiariII型畸形、脂肪瘤、脑膜脑膨出、蛛网膜囊肿及神经元移行异常等中枢神经系统畸形［1］。作者搜集DCC合并脂肪瘤30例，均行CT和/或MRI检查，着重分析本病的临床、CT及MRI表现特征，旨在提高对本病的认识。　　1资料与方法本组30例，其中男18例，女12例，年龄1.6个月～58岁。临床症状：癫痫12例，头痛、头晕10例。均有不同程度偏瘫、发育迟缓，智力及语言障碍，其中视力模糊4例。单纯CT检查14例，MRI检查8例，