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1、388齊魯醫(yī)學(xué)雜志2007年10月第22卷第5期MedJQilu,October2007,Vol.22,No.5Rathke裂囊腫的MRI表現(xiàn)1122于東升,劉世恩,郭永存,王德帥(1青島大學(xué)醫(yī)學(xué)院附屬醫(yī)院放射科,山東青島266003;2即墨市第三人民醫(yī)院)[摘要]目的探討Rathke裂囊腫的MRI特征性表現(xiàn)及鑒別診斷。方法搜集經(jīng)手術(shù)病理證實(shí)的Rathke裂囊腫23例,回顧性分析并總結(jié)其MRI表現(xiàn)。結(jié)果MRI平掃:病變多位于鞍內(nèi),呈類圓形,突入鞍上者呈啞鈴狀;信號表現(xiàn)多樣,T1WI序列可為低、等、高信號,T2WI序列多為高信號;囊內(nèi)可見漂浮結(jié)節(jié)影
2、者6例;囊底見沉淀物者2例。MRI增強(qiáng)掃描:病變未見明顯強(qiáng)化,3例僅可見囊壁強(qiáng)化。結(jié)論Rathke裂囊腫MRI平掃表現(xiàn)呈多樣性,但有一定的特征性;MRI增強(qiáng)掃描有利于與鞍區(qū)其他病變的鑒別診斷。[關(guān)鍵詞]Rathke裂囊腫;體層攝影術(shù),X線計算機(jī);磁共振成像[中圖分類號]R816.1[文獻(xiàn)標(biāo)識碼]A[文章編號]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裂囊腫是顱內(nèi)少見的良性腫瘤,MRIT1WI(TR/TE,350~500ms/8~15ms),FSE是診斷該病的重要影像學(xué)檢查方法,但由于對該病T2WI(TR/TE,3000~5000ms/90~120ms),層的認(rèn)識不足,術(shù)前及MRI平掃的誤診率較高。因而厚3mm,間隔0.5mm;矢狀位SET1WI(TR/TE,有必要回顧總結(jié)該病的M
7、RI表現(xiàn),以提高術(shù)前診斷350~500ms/8~15ms),層厚3mm,間隔的準(zhǔn)確性。0.5mm;橫軸位FSET2WI(TR/TE,3000~5000ms/90~120ms),行全腦掃描。MRI增強(qiáng)掃描常規(guī)1資料和方法序列為:橫軸位、矢狀位及冠狀位SET1WI(TR/TE,1.1一般資料350~500ms/8~15ms),層厚3mm,間隔0.5mm,收集我院經(jīng)手術(shù)病理證實(shí)的Rathke裂囊腫病造影劑采用順磁性造影劑釓噴酸葡胺(GdDTPA),人23例,其中男8例,女15例,年齡13~68歲,平按0.1mmol/kg劑量給藥。MR動態(tài)增強(qiáng)掃描常規(guī)
