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1、388齐鲁医学杂志2007年10月第22卷第5期MedJQilu,October2007,Vol.22,No.5Rathke裂囊肿的MRI表现1122于东升,刘世恩,郭永存,王德帅(1青岛大学医学院附属医院放射科,山东青岛266003;2即墨市第三人民医院)[摘要]目的探讨Rathke裂囊肿的MRI特征性表现及鉴别诊断。方法搜集经手术病理证实的Rathke裂囊肿23例,回顾性分析并总结其MRI表现。结果MRI平扫:病变多位于鞍内,呈类圆形,突入鞍上者呈哑铃状;信号表现多样,T1WI序列可为低、等、高信号,T2WI序列多为高信号;囊内可见漂浮结节影
2、者6例;囊底见沉淀物者2例。MRI增强扫描:病变未见明显强化,3例仅可见囊壁强化。结论Rathke裂囊肿MRI平扫表现呈多样性,但有一定的特征性;MRI增强扫描有利于与鞍区其他病变的鉴别诊断。[关键词]Rathke裂囊肿;体层摄影术,X线计算机;磁共振成像[中图分类号]R816.1[文献标识码]A[文章编号]10080341(2007)05038803CHARACTERISTICAPPEARANCEONMRIOFRATHKESCLEFTCYSTYUDONGSHENG,LIUSHIEN,GUOYONGCUN,etal(Departme
3、ntofRadiology,TheAffiliatedHospitalofQingdaoUniversityMedicalCollege,Qingdao266003,China)[ABSTRACT]ObjectiveTostudythecharacteristicappearanceanddiagnosisonMRIofRathkesCleftCyst.MethodsThecharacteristicMRIappearancesof23casesofhistologicallyconfirmedRathkesCleftCystinvolvedinourstu
4、dywereanalyzedretrospectively.ResultsAppearancesofRathkesCleftCystweremostlyroundlikeinsellaturcicaanddumbbelllikegrowedupsellaturcicaonplainscanningofMRI.ThecystsweremostlyhypointenseorevenintenseorhyperintenseonT1weightedimaging(T1WI)andhyperintenseonT2weightedimaging(T2WI).Appe
5、arancesof6caseswerefloatingnodesincystandof2caseswereseenperciptantunderthecyst.OnenhancedMRI:Mostlesionspresentnoobviousenhancementwithonly3casespresentcystwallenhancement.ConclusionMRIappearancesofRathkesCleftCystpresentmultiplebutsomecharacteristic.EnhancedMRIhaveuniqueadvantagesi
6、nthediagnosisofRathkesCleftCyst.[KEYWORDS]Rathkescleftcyst;tomography,Xraycomputed;magneticresonanceimagingRathke裂囊肿是颅内少见的良性肿瘤,MRIT1WI(TR/TE,350~500ms/8~15ms),FSE是诊断该病的重要影像学检查方法,但由于对该病T2WI(TR/TE,3000~5000ms/90~120ms),层的认识不足,术前及MRI平扫的误诊率较高。因而厚3mm,间隔0.5mm;矢状位SET1WI(TR/TE,有必要回顾总结该病的M
7、RI表现,以提高术前诊断350~500ms/8~15ms),层厚3mm,间隔的准确性。0.5mm;横轴位FSET2WI(TR/TE,3000~5000ms/90~120ms),行全脑扫描。MRI增强扫描常规1资料和方法序列为:横轴位、矢状位及冠状位SET1WI(TR/TE,1.1一般资料350~500ms/8~15ms),层厚3mm,间隔0.5mm,收集我院经手术病理证实的Rathke裂囊肿病造影剂采用顺磁性造影剂钆喷酸葡胺(GdDTPA),人23例,其中男8例,女15例,年龄13~68岁,平按0.1mmol/kg剂量给药。MR动态增强扫描常规
