脊髓海绵状血管瘤的MRI表现及其病理基础

目的：探讨脊髓海绵状血管瘤的MRI表现特征及其病理基础。方法：对比分析13例脊髓海绵状血管瘤患者术前的MRI表现及其术后病理标本。结果：13例脊髓海绵状血管瘤中，11例位于胸段，2例位于下颈段脊髓内，均为单发，病灶处脊髓增粗9例，萎缩2例，正常2例。病灶呈爆米花状或桑椹状，瘤巢较小，一般不超过脊髓横径。T1WI、T2WI均为混杂信号，且T2WI病灶周围呈低信号环10例，占76．92％；T1WI等信号、T2WI低信号2例，T1WI、T2WI均为高信号1例；增强扫描后，7例病灶中心有中等强化。MRI信号改变与瘤巢反复出血不同时期出血成分沉积及血栓形成、胶质增生密切相关。结论：MRI能反映脊髓海绵状血管瘤的病理变化，对术前确诊具有重要价值。

The correlation between the MRI manifestations and pathologic finding of spinal cord cavernous hemangioma(SCCH)

Objective:To evaluate the correlation between MRI manifestations and pathologic finding of SCCH. Methods:The MRI features and the pathologic finding of 13 patients with SCCH were compared. Results:The 1esions located in thorax segment and low cervical segment intramedullary of the spinal cord was 11 and 2 cases respectively.The entire lesion was solitary and less than the diameter of the spinal cord,just like popcorn or mulberry.The shape of the spinal cord was thicker in 9 cases.The MRI findings are characteristic with heterogeneous signal intensity abnormalities on T_1-weighted images(T_1WI) and T_2-weighted images(T_2WI),with a hypo-intense rim on T_2WI in 10 cases, iso-intensity relative to the spinal cord on T_1WI,hypo-intensity on T_2WI in 2 cases,hyper-intensity both in T_1WI and T_2WI in 1 cases.There was central homogeneous enhancement in 7 cases after intravenously administration of Gd-DTPA.The MRI appearances were correlation with pathologic changes of hemangioma in different period such as bleeding,deposit of hemosiderin and colloid hyperplasia.Conclusion:MRI can present the pathologic changes of cavernous hemangioma in different period,so it is the most specific and sensitive method in diagnosis of SCCH.