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时间:2019-11-26
《颅内软骨瘤的CT和MRI表现与病理对照_段芙红》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、·492·临床放射学杂志2012年第31卷第4期头颈部放射学颅内软骨瘤的CT和MRI表现与病理对照***段芙红,邱士军,姜建威,刘珍银,冯霞【摘要】目的探讨颅内软骨瘤的CT和MRI特征及其病理基础。资料与方法回顾性分析5例经手术病理证实的颅内软骨瘤的影像学表现。5例均行头颅CT、MRI平扫及增强扫描。结果5例中肿瘤位于颅底者4例,大脑镰区者1例。CT表现为不规则分叶状肿块,边界清楚,密度不均匀,5例伴明显钙化,瘤周无水肿,4例邻近骨质破坏,增强扫描无或轻度强化。MRI上肿块信号不均,实质部分T1Wl呈低或混杂
2、信号,T2WI呈高或高低混杂信号,钙化部分T1Wl及T2WI呈低信号,增强扫描5例均为明显不均匀强化,呈“石榴籽征”。结论颅内软骨瘤的CT、MRI表现具有一定特征性,结合临床,可提高其诊断准确率。【关键词】颅内软骨瘤磁共振成像体层摄影术,X线计算机IntracranialChondroma:CorrelationofCTandMRIFindingsandPathologyDUANFuhong,QIUShijun,JIANGJianwei,etal.MedicalImagingCenter,NanfangHospi
3、talofSouthernMedicalUniversity,Guangzhou,GuangdongProvince510515,P.R.China【Abstract】ObjectiveToinvestigatetheCT,MRIandpathologicfeaturesofintracranialchondroma.MaterialsandMethodsTheimagingfindingsof5patientswithintracranialchondromaconfirmedbyoperationandpat
4、hologywereana-lyzedretrospectively.PlainandenhancedCTandMRIscanningwereperformedinallofthecases.ResultsAmong5ca-ses,4caseswerelocatedatskullbase,and1casewasoriginatedfromthefalx.CTscansusuallyshowedwelldemarcated,irregularlobulatedandvariabledensitymasseswith
5、obviouscalcifications(5/5),notorslightlyenhancement,withoutper-itumoraledema,oftenaccompaniedbyerosionanddestructionofsurroundingbone(4/5).TheparenchymaofthetumorsappearedasheterogeneoushypointenseonT1WI,andhyperintenseormixedhyperandhypo-intenseonT2WI,whilet
6、hecalcificationinthemassdisplayedhypointenseonT1WIandT2WI.Allthecasespresentedsignificantlyinhomogeneousenhancementonpost-contrastMRI,demonstratingtypical“pomegranateseed”sign.ConclusionTherearesomecharac-teristicCTandMRIfeaturesinintracranialchondroma,itsdia
7、gnosticaccurateratecanbeimprovedcombinedwiththepa-tient’sclinicalinformation.【Keywords】IntracranialchondromaMagneticresonanceimagingTomography,X-raycomputed软骨瘤属于进行性软骨内化骨发育不良或增生于不典型的颅内软骨瘤易误诊为其他肿瘤,以致影紊乱的良性骨肿瘤。有软骨的骨骼均可发生软骨响患者的治疗及预后。笔者回顾性分析5例经手术[1]瘤,常好发于短管状骨,尤其是掌
8、指骨,而发生于病理证实的颅内软骨瘤患者的CT和MRI资料及病颅内者极少见。颅内软骨瘤(intracranialchondro-理特点,并结合国内外相关文献,以提高对本病的ma)是中枢神经系统罕见的良性肿瘤,仅约占颅内影像学诊断水平,减少误诊。[2]原发肿瘤的0.2%~0.3%。绝大部分好发于颅底,起源于软骨结合部,其他部位如大脑凸面、大脑1资料与方法[3]镰、脉络膜静脉丛
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