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1、异位胸腺瘤5例影像学表现的临床分析［摘要］目的探讨异位胸腺瘤(ET)的影像学表现,以提高对ET的认识。方法回顾性分析浙江大学金华中心医院2010〜2016年经病理证实的5例ET临床及影像学资料。其中CT平扫+增强扫描3例，CT平扫并MRI增强扫描1例,CT平扫+增强并PET/CT扫描1例。结果5例ET临床表现为乏力2例、无症状3例。发生于下颈部2例，后下纵隔2例，左侧胸膜累及纵隔1例。影像学5例平扫CT均表现为密度均匀，CT值范围33〜51HU,4例增强扫描动脉期结节状强化，静脉期均匀强化，平均强化幅度为34HU；1例MRI表现为呈等T1等T2信号，增强扫描明显均匀强化；1例PET/CT
2、表现为18F-FDG代谢明显增高。结论异位胸腺瘤少见，临床表现缺乏特异性，本组5例影像学表现具有一定特征：平扫密度均匀，增强扫描明显强化，PET/CT呈高代谢。正确认识其表现有助于提高诊断准确性。［关键词］异位胸腺瘤；CT；MRI；PET/CT［中图分类号］R746.1；R655.7［文献标识码］A［文章编号］1673-7210(2017)03(b)-0127-05Imagingfeaturesofectopicthymoma：reportoffivecasesandreviewofliteratureDONGKelCUICan2WANGLixia3WENGuanghual▲Depart
3、mentofNuclearMedicine,JinhuaHospitalofZhejiangUniversity,ZhejiangProvinee,Jinhua321000,China；2.DepartmentofRadiology,JinhuaHospitalofZhejiangUniversity,ZhejiangProvince，Jinhua321000,China；3.DepartmentofPathology,JinhuaHospitalofZhejiangUniversity,ZhejiangProvince，Jinhua321000,China[Abstract]Objec
4、tiveToinvestigatetheimagingfeaturesofectopicthymoma,inordertoimprovetheunderstandingofectopicthymoma・MethodsFrom2010and2016,theclinicalandradiographicdataof5caseswithectopicthymomaprovedbypathologicalresultswereanalyzedretrospective!y.3patientsunderwentenhancedCTexamination，1patientunderwentunenh
5、ancedCTandcontrast-enhancedMRIexamination，1patientunderwentenhaneedCTandPET/CTexamina廿on.ResultsAmong5cases,2casesshowedsymptomsoffatigue,while3casesshowednosymptoms.2lesionswerelocatedinthelowerneck,2caseswereintheposterior-iinferiormediastinum,1casewasintheleftpleurainvadedinmedias廿num.Onunenha
6、ncedCT,5tumorsshowedhomogeneousdensity(CTvalue33-51HU).OnarterialphaseoftheenhancedCTof4tumorsshowednodularenhancement，andontheveinphaseshowedhomogeneousenhancement.Aaverageenhancementdegreewas34HU.OnMRimages,1tumorshowediso-signalbothonT1WIandT2WI,obvioushomogeneousenhancementoncontrastMRimages・
7、OnPET/CTimages,1tumorshowedaccumulationof18F-FDG・ConclusionEctopicthymomaisarareneoplasmandtheclinicalmanifestationwerelackofspecificity・Allthe5casesexhibitssomeimagingcharacteristics,suchashomogeneousdensityonunenhanc
