颅内血管周细胞瘤与孤立性纤维瘤的影像与病理对照

目的对比分析颅内血管周细胞瘤与孤立性纤维瘤的影像学差异。材料与方法回顾性分析经手术病理证实的颅内血管周细胞瘤18例，孤立性纤维瘤10例，所有病例均行MR平扫及增强扫描，对其影像征象进行对照分析。统计学方法采用单因素分析，计数资料组间比较采用卡方检验。结果血管周细胞瘤与孤立性纤维瘤在与附着硬膜的关系、硬膜尾征征象方面无统计学意义(P＞0.05)；在肿瘤形态、T2WI信号、囊变坏死及出血、瘤周水肿、骨质破坏及强化方式方面差异有统计学意义(P＜0.05)。前者肿瘤形态多呈分叶状、不规则形， T2WI等高信号，囊变坏死及出血多见，瘤周水肿较明显，颅骨破坏可见，增强后明显强化；后者肿瘤形态多呈类圆形或椭圆形，T2WI有低信号区，囊变坏死及出血少见，瘤周水肿轻，无颅骨破坏，增强后明显强化，并有延迟强化。结论颅内血管周细胞瘤与孤立性纤维瘤影像表现存在一定差异。

Comparison of imaging and pathological ifndings of intracranial hemangiopericytoma and solitary ifbrous tumour

Objective: To compare and analyze imaging features of intracranial hemangiopericytoma(HPC) and Solitary fibrous tumour(SFT). Materials and Methods:Eighteen patients of HPC and 10 patients of SFT proved by operation and pathology were analyzed retrospectively. Both plain and enhanced MR scans were performed and the results were analyzed in all cases. Results:There were no signiifcant difference between HPC and SFT in relation to the attachment of the dura mater, dural tail sign(P>0.05). The difference between the two groups were signiifcant difference, in relation to tumor shape, T2WI signal, necrotic and cystic areas and hemorrhage, peritumoral edema, skull destruction, enhancement(P<0.05). Conclusion:Imaging ifndings of intracranial HPC and SFT are different, the former has mostly lobulated, irregular shape, iso-high signal on plain T2WI, cystic necrosis and hemorrhage more common, obvious peritumoral edema, visible skull destruction, significant enhancement; the latter is mostly round or oval, low signal area on plain T2WI, rare cystic and necrosis, hemorrhage, light peritumoral edema, no skull destruction, signiifcant enhancement with delayed enhancement.