椎管内脊膜瘤34例的MRI诊断分析及临床意义的评价

目的:探讨脊膜瘤的磁共振(MRI)表现特征及临床意义。方法:收集并分析行MRI检查且经手术及病理证实的脊膜瘤34例,观察肿瘤的部位、瘤体信号表现、增强后的信号特征及邻近脊膜改变。结果:位于胸段26例,颈段4例,腰段4例。肿瘤信号不均5例,囊变1例,邻近硬脊膜增厚3例,宽基底征象20例。增强后肿瘤均有强化信号。结论:脊膜瘤好发于女性,多位于胸段硬膜下间隙,大部分呈实体性,囊变出血少见,肿瘤信号不均匀,主要原因是瘤内钙化程度不一。注入钆喷酸葡胺(GD-DTPA)后肿瘤均有其强化特征。脊髓呈慢性受压缩细征象。脊膜瘤可引起相邻脊膜增厚,增强后呈"鼠尾征"。

MRI Diagnosis and Clinical Significance of 34 Cases of Intra-spinal Meningioma

Objective:To investigate the MRI features and clinical significance of intra-spinal meningioma.Methods: 34 cases of intra-spinal meningioma confirmed by surgical operation and pathological diagnosis were collected and analyzed.Tumor site,tumor signal performance,enhanced signal characteristics and changes in neighboring meninges were observed.Results: 26 lesions of intra-spinal meningioma occurred in the thoracic segments,4 lesions in the cervical segments,4 lesions in the lumbar segments.Hetergenous signal of tumor occurred in 5 lesions,cystic change in 1 lesion,adjacent spinal dura mater thickened in 3 lesions,wide base signs appeared in 20 lesions.Most tumors showed enhancement signal in contrast enhancement.Conclusion: The spinal meningioma most often occurred in females,which mainly located at the intra-dural space of throcic segments.Most tumors were solid,hemorrhage cystic change was less.The signal of tumors was hetergenous because the degree of calcification was different in tumors.All tumors appeared enhancement pattern after injection GD-DTPA.Spinal cord showed chronic compressed and thinned sign.Spinal meningioma can cause the adjacent dura thickening,with "Mouse-tail sign" in contrast enhancement.