MRI表现及ADC值在Tornwaldt囊肿诊断中的价值  

Values of MRI features and apparent diffusion coefficient in the diagnosis of Tornwaldt cyst

作　　者：汪翀效 翟建 张发平[1] 

机构地区：[1]皖南康复医院芜湖市第五人民医院放射科,安徽芜湖241000 [2]皖南医学院第一附属医院弋矶山医院医学影像中心,安徽芜湖2410001

出　　处：《皖南医学院学报》2017年第5期484-486,共3页Journal of Wannan Medical College

摘　　要：目的:探讨鼻咽部Tornwaldt囊肿的MRI表现及ADC值的价值。方法:回顾性分析18例Tornwaldt囊肿的临床及常规MRI表现特征,并做随访分析。测量病变区及脑脊液ADC值,比较两者差异。结果:18例Tornwaldt囊肿于MRI各个平面及序列均清晰显示,而以轴位T2WI显示最佳,其中15例位于鼻咽部正中央,1例位于鼻咽部右旁,2例位于鼻咽部左旁,表现为边界清晰的类圆形囊性病灶,T2WI、FLAIR均为高信号,T1WI呈低、等、高信号,表观扩散系数(ADC)均为高信号,MRI增强扫描无明显强化。Tornwaldt囊肿ADC值(1.99±0.19)×10^(-3)mm^2/s,明显低于脑脊液ADC值(3.27±0.16)×10^(-3)mm^2/s,差异有统计学意义(t=19.28,P<0.01)。结论:Tornwaldt囊肿有典型的发病部位(鼻咽部中线),其MRI表现具有一定特征,结合ADC值可明确诊断并与其他囊性病变相鉴别。Objective： To assess the values of magnetic resonance imaging（ MRI） features and apparent diffusion coefficient（ ADC） in the diagnostic of Tornwaldt cyst in the nasopharynx. Methods： Retrospective analysis was performed pertaining to the clinical manifestations,MRI findings and follow-up information in 18 cases of Tornwaldt cyst. The ADC value was measured at the lesions and in the cerebrospinal fluid（ CSF）,and the difference was compared. Results： Tornwaldt cyst was exposed by plane scans and MR sequence scanning in the 18 cases,yet was best displayed in the axial plane T2 WI.Tornwaldt cyst was seen in the midline of the nasopharynx in 15 cases,at right lateral nasopharynx in 1 and at left lateral nasopharynx in 2. The cyst was presented by circular and oval shape with clear border,and hyperintensity on T2 WI and FLAIR,yet low,medium and high intense on T1 WI. Enhanced MR scanning showed no significant signal intensity,yet ADC demonstrated high intensity. The ADC value was（ 1.99± 0.19） × 10^（-3 ）mm^2/s for Tornwaldt cyst and（ 3.27±0.16） ×10^（-3） mm^2/s for CSF. The difference was significant（ t = 19.28,P0.01）. Conclusion： Tornwaldt cyst can typically occur in the midline of the nasopharynx,and is featured on MRI. Diagnosis of the Tornawladt cyst by MIR and ADC may make differentiation of this entity from similar lesions.

关 键 词：TORNWALDT囊肿 磁共振成像 表观扩散系数 

分 类 号：R445.2[医药卫生—影像医学与核医学]