MRI诊断中枢神经系统脱髓鞘性假瘤的价值分析  

Diagnostic value of MRI in demyelinating pseudotumor of central nervous system

作　　者：杨娴 Yang Xian(Department of Medical Imaging,Huanggang Central Hospital,Huanggang 438000,China)

机构地区：[1]黄冈市中心医院医学影像科,黄冈438000

出　　处：《现代仪器与医疗》2022年第5期22-25,共4页Modern Instruments & Medical Treatment

基　　金：湖北省科技厅科研基金资助(2021CFB530)。

摘　　要：目的探讨磁共振成像技术(Magnetic Resonance Imaging,MRI)对中枢性神经系统脱髓鞘性假瘤(Demyelinating Pseudo Tumor Lesion,DPT)的诊断价值.方法选取本院2019年1月—2022年1月接诊的疑似DPT患者120例,收集其治疗前后MRI(平扫+增强)影像资料,以病理结果为标准,分析MRI检查的诊断效能,并总结DPT的影像特点.结果120例患者MRI共检出162个病灶,其中单发患者101例,多发患者19例.治疗前MRI检测出145个DPT病灶;MRI平扫显示脑部局部肿块,112个病灶长度均一的长.T1长T2,47个病灶呈不均匀长T1长T2,3个呈等长T1长T2,122个病灶增强扫描显示不同程度的强化,可呈条状、火焰状、环状、非闭合环形强化等,40个病灶未见明显强化.MRI诊断DPI的敏感性为97.30%,特异性为77.78%,准确率为95.83%,阳性预测值为98.18%,阴性预测值为70.00%.结论DPT的增强MRI扫描图像具有一定的特点,如非闭合环形增强和垂直于侧脑室的线性增强,有利于DPT和颅内肿瘤的鉴别.MRI检查,尤其是增强扫描,具有较高的临床价值,可用于DPT的术前诊断和术后复查.ObjectiveTo investigate the diagnostic value of Magnetic resonance imaging(MRI)in central nervous system demyelinating pseudo tumor lesion(DPT).Methods A total of 120 patients with suspected DPT in our hospital from January 2019 to January 2022 were selected,MRI imaging data(plain scan+enhanced scan)before and after treatment were collected.The diagnostic efficacy of MRI examination was analyzed based on pathological results,and the imaging characteristics of DPT were summarized.ResultsA total of 162 lesions were detected by MRI in 120 patients,including 101 single lesions and 19 multiple lesions.145DPT were detected by MRI before treatment.MRI plain scan showed localized mass in the brain,112 lesions showed uniform long T1 and long T2,47 lesions showed heterogeneous long T1 and long T2,and 3 lesions were equal to T1 and long T2.On enhanced scan,122 lesions showed different degrees of enhancement,such as lamellar,flame,annular,and non-closed annular enhancement,while 40 lesions showed no obvious enhancement.The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of MRI in thediagnosis of DPI were97.30%,77.78%,95.83%,98.18%and70.00%,respectively.ConclusionThe enhanced MRI images of DPT have certain characteristics,such as non-closed annular enhancement and linear enhancement perpendicular to the lateral ventricle,which is beneficial to the differentiation of DPT from intracranial tumors.MRI,especially enhanced scan,has high clinical value,and can be used for preoperative diagnosis and postoperative review of DPT.

关 键 词：核磁共振成像 中枢性神经系统脱髓鞘性假瘤 诊断 平扫 增强扫描 

分 类 号：R445.2[医药卫生—影像医学与核医学]