【摘要】 目的 分析恶性脑膜瘤的CT、MRI表现,提高其术前定性诊断率。方法 回顾性分析10例恶性脑膜瘤的CT、MRI表现。结果 10例肿瘤均为单发,大脑凸面4例,大脑镰旁3例,海绵窦旁、矢状窦旁及蝶骨嵴各1例。密度、信号不均匀者9例,肿瘤邻近颅骨骨质破坏3例,其中1例局部形成软组织肿块并突向颅外。9例表现为不均匀增强;2例出现粗细不规则的“脑膜尾征”。结论 恶性脑膜瘤术前定性有一定困难,关注影像学特征有利于提高恶性脑膜瘤的术前诊断率。更多还原

【Abstract】 Objective To analyze CT and MRT features of the malignant meningioma,in order to improve the diagnostic accuracy.Methods CT and MRI manifestations of 10 patients with malignant meningiomas were retrospectively analyzed.Results The tumors in all cases were single,4 were located in cerebral hemisphere,3 at the region of falx cerebri,1 in cavernous sinus,1 in ongitudinal sinus and 1 in crista sphenoidalis.The density of 9 cases were homogeneous,3 cases accompanied with adjacent bony destruction,one of them formed soft-tissue mass and extended to extracranum.9 cases presented inhomogeneous enhancement in the arterial phase and 2 cases had meningeal tail sign on contrast-enhanced scan.Conclusion The qualitative diagnosis of malignant meningioma before operation is difficult,but the imaging manifestations can pay an important role in evaluating the diagnosis accurately before operation.更多还原