孤立性纤维性肿瘤的CT及MRI表现-论文.pdf

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1、胸部影像学CHESTIMAGfNG231孤立性纤维性肿瘤的CT及MRI表现王佳丽徐凯许倩张秀莉鹿彩銮【摘要】目的：探讨孤立性纤维性肿瘤(SFT)的影像表现。方法：回顾性分析经免疫组化证实的21例SFT的CT~t．MRI表现。CT平扫16例，CT增强9例，MR平扫6例，MR增强4例，2例同时行CT和MR检查。分析病灶的大小、部位、轮廓、密度／信号特征以及强化方式。结果：本组SFT发生于胸部7例，腹部及盆腔5例，颅内3例，肩关节、锁骨下区、小腿、乳腺、颌面部及眼眶内各1例。肿瘤边界清楚者16例，边界不清或部分不清者5例。16例CT平

2、扫中9例密度均匀，7例密度不均匀，内可见低密度区，其中l例见高密度出血灶。9例CT增强均呈不均匀强化，实性成分动脉期可见迂曲血管影，静脉期7例表现为渐进性强化且强化趋于均匀，2例为持续性强化。MRI平扫，T1wI呈等或略高于肌肉信号，T2WI多为以高信号为主的混杂信号；5例内示血管流空信号。增强后呈不均匀强化。结论：SFT可发生于机体的多个部位，影像上多为孤立性、边界清楚的软组织肿块，密度，信号不均，多有囊变区；增强扫描不均匀强化，且多延迟强化。定性需靠病理及免疫组织化学检查。【关键词】孤立性纤维性肿瘤；体层摄影术，x线计算机；

3、磁共振成像中图分类号：R445．2，R445．3文献标志码：A文章编号：1006．5741(2014)．03．0231．05CTandMRIManifestationsofSolitaryFibrousTumorWANGJia—li，XUKai，XUQian，ZHANGXiu—li，LUCai-luan【Abstract】Purpose：Toinvestigatetheimagingcharacteristicsofsolitaryfibroustumor(SFT)．Meth—ods：Twenty-onepatientswith

4、histopatho1ogicallyconfirmedSFTwerecollected．Ofal1thepatients，16underwentCTplainscan，and9underwentenhancedscan，6underwentMRplainscan，and4underwentenhancedMRscan，2underwentbothCTandMRscan．Tumorsize，margin，locationandtumordensity／signalcharacteristicsonnon-enhancedande

5、nhancedscanswereanalyzedretrospectiVely。Results：Sevencaseswerelocatedinthethoraciccavity,5casesinabdominalandpelvis．3casesinintracrania1and1caseinshoulderjoint，infraclavicularregion，calf,breast，orbitandmaxillofacialregionrespectively．Sixteentumorshadwell-definedconto

6、urs．OnCTscan，9casesshowedhomogeneousdensity，7casesshowedheterogeneousdensitywithlow—densityareas，andhemorrhagewasfoundedin1case．On9casesofenhancedCTscans，allshowedinhomogeneousenhancement，multiplevesselswereshowninthearterialphase，andprogressiveenhancementwasshownin7

7、casesandcontinuousenhancementin2casesinthevenousphase．OnMRI，T1WIdemonstratediso-intenseorslighthyper-intensesignal，andT2WIdemonstratedmixedsignal(hyper-intensedominantly)．Flowingvoideffectcouldbedetectedin5cases．A1lofthemshowedinhomogeneousenhancement．Conclusion：SFTc

8、anbeseeninmulti—partsofthebody,anddemonstratessinglesofttissuemasswithwell—definedborder，heterogeneousdensityorsigna1．MostSFTareinh