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目的:评价MRI对颅内血管外皮细胞瘤(intracranial hemangiopericytoma,HPC)的诊断价值。方法:回顾性分析手术、病理证实6例颅内血管外皮细胞瘤患者的MRI影像资料,研究病变基本特征、信号特点及强化方式。结果:6例均位于颅内脑外,多为不规则分叶状软组织肿物,病灶大小平均为5.3cm,占位效应明显,瘤周水肿较轻,肿瘤内均可见迂曲流空血管。病灶以等高TW2、等低TW1信号为主,4例出现囊变、坏死及出血信号。增强扫描病灶呈明显均匀强化,囊变部分无强化。结论:颅内血管外皮细胞瘤MRI表现具有一定特征性:肿瘤体积较大、多呈分叶状软组织肿块,以等TW1、等TW2信号为主,其内可见丰富血管流空、坏死及囊性变,有占位效应,但瘤周水肿不明显;增强扫描实体呈明显均匀强化,可出现“脑膜尾征”。
Objective: To evaluate the value of MRI in the diagnosis of intracranial hemangiopericytoma (HPC). Methods: The MRI data of 6 patients with intracranial hemangiopericytoma confirmed by surgery and pathology were retrospectively analyzed. The basic characteristics of lesions, the characteristics of signals and the ways of enhancement were studied. Results: Six cases were located in the intracranial brain, mostly irregular lobulated soft tissue tumor, the average size of the lesion was 5.3cm, significant mass effect, less edema of the tumor, tortuous blood vessels can be seen within the tumor. Lesions to contour TW2, TW1 low signal-based, 4 cases of cystic degeneration, necrosis and bleeding signals. Enhanced scanning lesions were significantly enhanced, no enhancement of cystic part. Conclusion: The MRI findings of intracranial hemangiopericytoma have certain characteristics: the tumor size is larger, mostly lobulated soft tissue mass, such as TW1, such as TW2 signal-based, which can be seen in the rich vascular flow empty, necrosis and cystic Change, there are occupying effect, but the peritumoral edema is not obvious; enhanced scanning entity was significantly uniform enhancement, there may be “Meningeal sign ”.