脊髓血管母细胞瘤的MRI特征分析

MR findings of spinal hemangioblastoma

目的:探讨分析脊髓血管母细胞瘤的MRI特征,提高诊断符合率。方法:回顾性分析经手术病理证实的8例脊髓血管母细胞瘤的MRI表现,全部患者均行MRI平扫及增强扫描。结果:单发4例,多发4例,共有脊髓血管母细胞瘤病灶13个,所有病灶均位于髓内。其中,颈段6个,胸段6个,腰段1个。病灶MRI上分为2型:囊腔结节型(4例),实质结节型(9例),12例病灶伴脊髓空洞或水肿。囊腔结节型呈"大囊小结节"的特征性表现,囊性部分均呈T1WI低信号,T2WI高信号,结节部分(除1例外)与实质结节型病灶一样均呈T1WI等或略低信号,T2WI略高或高信号。增强扫描呈明显结节强化,且强化可以持续较长时间,9例强化后可见流空血管。结论:MRI技术具有高分辨率及多平面成像功能,对于脊髓血管母细胞瘤的定位及定性诊断有重要意义。

Objective：The purpose of this study was to elucidate the MR features of intraspinal hemangioblastoma so as to improve the accuracy of the diagnosis.Methods：MR findings of 8 patients with intraspinal hemangioblastoma confirmed histopathologically were analyzed retrospectively.All of the patients underwent routine enhanced MR scan.Results：There were 4 cases with solitary tumor and 4 cases with multiple tumors.A total of 13 intraspinal hemangioblastomas were located intramedullary,6 tumors at the cervical segment,6 at the thoracic segment,and 1 at the lumbosacral segment.There were 12 tumors accompanied with syringomyelia or spinal cord edema.According to the MR characterics the tumors were divided into two types：cyst-nodule type（4 cases） and solid type（9 cases）.The characteristic manifestations of the cyst-nodule type were ＂the big sac containing small nodules＂.The signals of the cyst were hypointense on T_1WI and hyperintense on T_2WI.The signals of the nodules（except for 1 case） were isointense or slight hypointense on T_1WI and hyperintense on T_2WI just similar to the solid lesions.After contrast injection,all tumors showed obviously nodular and long-lasting enhancement,and the ＂flow-void＂ phenomenon of vessels could be found clearly in 9 cases.Conclusion：MRI is a important tool in the localization and characterization of intraspinal hemangioblastoma.