椎管内海绵状血管瘤的MRI诊断

MRI Diagnosis of Carvenous Hemangioma in the Spinal Canal

目的:探讨椎管内海绵状血管瘤的MRI定性诊断价值。方法:回顾性分析9例经手术病理证实的椎管内海绵状血管瘤的MRI表现.9例均行MRT1WI和T2WI,7例行增强扫描。结果:9例椎管内海绵状血管瘤中,7例位于胸椎椎管,2例位于颈胸椎椎管;9例肿瘤均沿脊椎纵轴、呈梭形或长条形生长,主要位于椎管内硬膜外腔;横轴面图像上肿块呈钳状包绕、推压邻近脊髓,2例肿瘤侵犯、压迫相邻的椎间孔并使其扩大,且经椎间孔突入椎旁间隙呈哑铃状。9例肿瘤中7例信号均匀,于T1WI上呈低信号,于T2WI上呈高信号,增强扫描示病灶呈较均匀一致的明显强化;2例肿瘤合并出血,T1WI和T2WI上均呈不均匀混杂信号。9例中2例合并椎体血管瘤。结论:椎管内海绵状血管瘤的MRI表现有一定特征性。

Objective：To study the value of diagnosis of carvenous hemangioma in spinal canal by MRI. Methods： Ret rospectively analyzed the MRI manifestations of 9 patients with carvenous hemangioma in spinal canal proved by surgery and pathology. All of the 9 patients had T1WI and T2WI;7 patients had contrast enhanced MRI. Results：Of the 9 patients, 7 patients had the lesion located within thoracic vertebral canal,2 within cervicothoracic vertebral canal, mainly epidural. All of the tumors grew along the longitudinal axis of vertebral spine as fusiform or linear strip in shape. On axial plane, the tumor showed clamp-like mass which surrounded and pushed the adjacent spinal cord. Tumor invaded and depressed adja- cent intervertebral foramen and made the intervertebral foramen enlarged in 2 patients and intruded into the para-spinal space showing a dumbbell appearance. The tumors showed hypo-intensity on T1WI and hyper-intensity on T2WI in seven cases,homogeneous and marked enhancement was revealed after contrast administration. 2 cases were complicated with bleeding showing heterogeneous intensity on T1WI as well as T2WI;2 patients were associated with hemangioma of verte bral spine. Conclusion：Certain specific MRI manifestations of carvenous hemangioma within spinal canal could be assessed.