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目的回顾分析颅内血管外皮细胞瘤(hemangiopericytom as,HPC)及脑膜瘤的MRI表现,以获得对颅内HPC的诊断及鉴别诊断具有价值的MR I特征。资料与方法选取经病理证实的颅内HPC患者11例及脑膜瘤患者107例。用2χ检验、Fisher确切概率法对比分析两组之间差异是否存在统计学意义。结果颅内HPC的MRI表现:肿瘤呈分叶状9例(81.8%),7例(63.6%)肿瘤以窄基底附着硬膜上,7例(63.6%)肿瘤内部呈迂曲的血管信号,8例(72.7%)肿瘤内囊变、坏死,7例(63.6%)T2W I呈等高信号,8例(72.7%)扩散加权成像(DW I)呈高信号;增强扫描肿瘤明显强化11例(100%),5例(45.5%)可见瘤周水肿。肿瘤形态(P<0.01)、肿瘤内部迂曲的血管信号(P<0.01)、T2WI信号强度(P<0.05)及DWI信号强度(P<0.01)在两组之间差异有显著统计学意义。结论颅内HPC的MRI表现具有一定特征性。肿瘤形态、T2WI及DW I信号、肿瘤内部迂曲的血管信号是鉴别颅内HPC及脑膜瘤的重要征象。
Objective To retrospectively analyze the MRI findings of intracranial hemangiopericytosis (HPC) and meningioma in order to obtain MR I characteristics that are valuable for the diagnosis and differential diagnosis of intracranial HPC. Materials and Methods Eleven patients with pathologically confirmed intracranial HPC and 107 patients with meningioma were selected. Using 2χ test, Fisher exact test to compare the difference between the two groups whether there is statistical significance. Results MRI manifestations of intracranial HPC showed that the tumors were lobulated in 9 cases (81.8%), in 7 cases (63.6%) with narrow base attached to the dura mater, and in 7 cases (63.6%) showed tortuous vascular signals inside the tumor. 8 Eight cases (72.7%) of DWI showed high signal in 7 cases (63.6%) with T2WI, and enhanced signal enhancement in 11 cases (72.7% 100%), 5 cases (45.5%) showed peritumoral edema. (P <0.01), T2WI signal intensity (P <0.05) and DWI signal intensity (P <0.01). There was a significant difference between the two groups in tumor morphology (P <0.01). Conclusion MRI manifestations of intracranial HPC have certain characteristics. Tumor morphology, T2WI and DWI signals, tortuous intravascular tumor signal is to identify intracranial HPC and meningioma an important sign.