颅内血管外皮细胞瘤的CT及MRI诊断

CT and MR imaging diagnosis of intracranial hemangiopericytoma

目的:分析颅内血管外皮细胞瘤的CT及MRI影像表现。方法:选取经手术病理证实的颅内血管外皮细胞瘤10例,男6例、女4例,所有病例均进行了CT及MRI检查。结果:回顾分析其CT及MRI影像表现有如下特点,CT:①肿瘤表现为等低混杂密度或等低高混杂密度,增强扫描后,肿瘤通常为明显不均匀强化;②肿瘤临近骨质可有破坏,但无增生硬化;③半数以上肿瘤与硬膜窄基底相连;④肿瘤形态呈分叶状或菜花状。MR:①肿瘤主要表现为等长混杂T1、等长混杂T2信号影,偶可见短T1或短T2信号影,注药后,肿瘤增强明显但不均匀;②外形呈不规则分叶状;③半数以上的肿瘤与硬膜窄基底相连;④肿瘤内常可见血管流空影而见不到钙化影。结论:颅内血管外皮细胞瘤有比较典型的CT及MR影像特点,结合临床表现有助于其术前正确诊断。

Objective：To study the CT and MRI findings of intracranial hemangiopericytoma. Methods：Tne CT and MRI in 10 pathologically proved eases of intracranial hemangioperieytomas were retrospectively reviewed. 6 males, 4 females. Results： The CT and MRI in 10 pathologically proved cases of intraeranial hemangiopericytomas were as follow： CT： ① The tumors appeared mixed iso-and hypedense or mixed iso-and hypo-and hyperdense. After contrast injection, the tumors usually enhanced marked and heterogeneously;② Bone erosion was present, but hyperostosis was not present;③ More than half tumors were narrow-based dural attachment; ④ The tumors showed lobulated in shape. The MRI characteristics were as follows： ① The tumors showed mainly iso-and hypointemity with cortical, gray matter on T1-weighed images and iso-and hyperintensity on T2-weighted images. The hypefintensity on T1-weighted images and hypefintensity on T2-weighted images were unusual observed in tumors. After contrast injection, the tumors usually enhanced markedly and heterogeneously ;②The tumors showed lobulated in shape;③ More than half tumors were narrow-based dural attachment; ④ Many signal voids of vessel in tumors were often observed, but calcification was not observed. Conclusion： The CT and MRI appearances of intraeranial hemangiopeficytomas are characteristic, it is helpful to get a correct diagnosis with clinical features.