MRI征象及ADC值对颅内血管周细胞瘤与非典型脑膜瘤的鉴别诊断价值

MRI Signs and ADC Value in Differential Diagnosis of Hemangiopericytoma and Atypical Meningioma

目的:探讨MRI征象及ADC值对颅内血管周细胞瘤(HPC)与非典型脑膜瘤(AM)的鉴别诊断价值。方法:选取本院2016年1月-2019年1月收治的32例HPC患者作为HPC组,并选取同期28例AM患者作为AM组。比较两组MRI征象与ADC值,分析ADC值对HPC与AM的鉴别诊断价值。结果:HPC组血管流空与窄基底附着比例均高于AM组,而脑膜尾征比例低于AM组(P<0.05);两组形态、囊性坏死、出血、T1及T2信号及强化情况比较,差异均无统计学意义(P>0.05);两组病灶水肿程度比较,差异无统计学意义(P>0.05),两组病灶大小比较,差异无统计学意义(P>0.05)。HPC组ADC值高于AM组(P<0.05)。ADC值鉴别HPC与AM的ROC曲线下面积为(0.98±0.04),最佳诊断阈值为0.95×10^-3 mm^2/s,诊断敏感度为100%,特异度为92.38%。结论:HPC与AM的MRI征象具有特异性,MRI征象与ADC值在鉴别HPC与AM中具有重要价值。

Objective:To investigate the differential diagnostic value of MRI signs and ADC values for hemangiopericytoma(HPC)and atypical meningioma(AM).Method:A total of 32 HPC patients admitted to our hospital from January 2016 to January 2019 were selected as the HPC group,and 28 AM patients in the same period were selected as the AM group.MRI signs and ADC values of the two groups were compared.The differential diagnosis value of ADC value for HPC and AM was analyzed.Result:The proportion of vascular flow null and narrow substrate attachment in HPC group were higher than those in AM group,while the proportion of meningeal tail sign was lower than that of AM group(P<0.05).There were no significant differences in morphological,cystic necrosis,bleeding,T1 and T2 signals and enhancement(P>0.05).There was no statistically significant difference in the degree of lesion edema between the two groups(P>0.05).There was no significant difference in lesion size between the two groups(P>0.05).The ADC value of HPC group was higher than that of AM group(P<0.05).The area under ROC curve of ADC value for distinguishing HPC from AM was(0.98±0.04),the optimal diagnostic threshold was 0.95×10^-3 mm^2/s,the diagnostic sensitivity was 100%,the specificity was 92.38%.Conclusion:MRI signs of HPC and AM are specific,and MRI signs and ADC values have important value in the identification of HPC and AM.