摘要
目的探讨MRI对腰骶段椎管内各种病变的定性诊断价值。方法对已手术和病理证实的82例腰骶段椎管内各种病变(包括30例神经鞘瘤、8例神经纤维瘤、6例脊膜瘤、2例室管膜瘤、3例畸胎瘤、10例脂肪瘤和/或伴脊髓栓系综合征、3例硬膜内转移瘤、14例椎管内外转移瘤、2例血管畸形及淋巴瘤、脂肪肉瘤、节细胞神经瘤、肉芽肿性蛛网膜炎各1例)的MR表现进行综合分析及系统比较。结果神经类肿瘤多呈长T1长T2信号,其中神经鞘瘤易有坏死、囊变、可见斑点征、跨越椎间孔和不均匀性明显强化,神经纤维瘤常多发。脊膜瘤多呈等T1稍长或等T2信号,较均匀性一般强化和可见脊膜尾征。腰段室管膜瘤多较大,呈腊肠状,沿脊髓纵轴生长,肿瘤内及两端常见坏死或继发空洞。畸胎瘤、脂肪瘤、血管畸形、转移瘤等亦均有各自特征。结论MRI平扫加增强能对腰骶段椎管内大多数病变进行初步定性,为临床选择治疗方案及估计预后提供较为可靠的依据。
Objective To investigate the value of conventional MRimaging in the diagnosis and differentiation of lumbosacral spinaltumors. Methods The MR imaging features of 82 patients withlumbosacral intraspinal tumors proved by surgery and pathologywere systematically analyzed. Results Neuromas tended to showhypointense signals on T1WI and hyperintense on T2WI,Neu-rilemmomas frequently menifested necrosis or cyst,dot sign,crossing interverterbral foremen and markedly heterogeneousenhancement. Neurofibromas were characterized by multiplicity.Meningiomas tended to be isointense on T1WI and slighthyperintense or isointense on T2WI,mild or moderate homoge-neous enhancement and dural tail sign.Lumbar ependymomasgrew longitudinally along spinal cord,usually with large size andin sausage shape,frequently associated with necrosis or cavity.Teratoma, lipoma,vascular malformations,metastasis also hadtheir own features. Conclusion Conventional MRI can primarilydifferentiate a majority of lumbosacral spinal tumors,offering areliable basis of choosing management methods and predictingthe prognosis.
出处
《中国CT和MRI杂志》
2004年第3期44-47,共4页
Chinese Journal of CT and MRI
基金
深圳市卫生科技立项项目(项目基金编号:200304030)
