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目的:探讨椎管内脊膜瘤的MRI特征并评价它们在脊膜瘤诊断中的价值。方法:回顾性分析经手术和病理证实21例椎管内脊膜瘤患者的MRI资料,观测肿瘤位置、形态、大小、信号强度、强化特点及其与邻近结构的关系。结果:21例脊膜瘤患者中,发病部位胸段14例,颈段5例,腰段2例。肿瘤均位于髓外硬膜下,呈扁丘状或椭圆形,其与硬膜面夹角为钝角,脊髓面圆钝且分界清楚,肿瘤纵径均大于横径。T1WI上大多数病例(90.5%)呈等信号或略低信号,T2WI上90.4%的病例呈等信号或略高信号。增强扫描16例(76.2%)呈明显均匀强化,13例(61.9%)出现“脊膜尾征”。结论:椎管内脊膜瘤MRI表现具有一定特征性,其中病变形态、信号及强化特征对其定性诊断具有重要价值。
Objective: To investigate the MRI features of spinal meningeoma and to evaluate their value in the diagnosis of meningioma. Methods: MRI data of 21 cases with spinal meningioma confirmed by surgery and pathology were retrospectively analyzed. The location, shape, size, signal intensity, enhancement and the relationship with adjacent structures were observed. Results: In 21 cases of meningioma, the incidence of thoracic site in 14 cases, 5 cases of cervical and 2 cases of lumbar. Tumors are located outside the extramedullary dura, was flat or oval-shaped, with the angle between the dura obtuse, rounded spinal cord surface and a clear boundary, the tumor longitudinal diameter greater than the diameter. The majority of T1WI cases (90.5%) showed equal or slightly lower signals, and 90.4% of T2WI showed equal or slightly higher signals. Enhanced scanning in 16 cases (76.2%) was significantly uniform enhancement, 13 cases (61.9%) “spina bifida ”. CONCLUSION: The MRI findings of spinal meningeal tumor have certain characteristics. The morphology, signal and enhancement features of lesions have important value in the qualitative diagnosis.