脊髓血管母细胞瘤的MRI特点

MRI characteristics of spinal cord hemangioblastoma

目的分析探讨脊髓血管母细胞瘤的MRI表现特征。方法回顾性分析经手术病理证实的7例脊髓血管母细胞瘤的临床及MRI表现。全部患者均行MRI平扫及增强扫描。结果单发6例,多发1例,共有脊髓血管母细胞瘤病灶8个,所有病灶均位于髓内。其中,延髓1个,颈段4个,胸段2个,腰段1个。肿瘤多呈点状、结节状、香肠状或不规则形状,肿瘤在MRI T1WI呈等或稍低信号,T2WI呈稍高信号,增强扫描上下径<20 mm的病灶呈明显、均匀强化,上下径>20 mm的病灶呈明显不均匀强化,其内可见多发流空的血管影;7例患者均伴有不同程度脊髓空洞或水肿。结论脊髓血管母细胞在MRI中具有特征性的影像表现,MRI对诊断脊髓血管母细胞瘤具有重要价值。

Objective To elucidate the MRI characteristics of spinal cord hemangioblastomas. Methods The clinical data and MRI findings in seven patients with pathologically confirmed spinal cord hemangioblastimas were reviewed retrospectively. All of the patients underwent MRI scan. Results The hemangioblastimas showed single lesion in six patients and showed muhiple lesions in one case by MRI. A total of eight intraspinal hemangioblastimas were located in intramedullary, including single lesion at medulla oblongata, four lesions at the cervical spinal cord, two lesions at the thoracic spinal cord and one lesion at the lumbar spinal cord. Tumors showed point-like or nodular appearance, some of them sausage-like or irregular shape. The tumors were isointensity or slight hypointensity on T1WI and hyperintensity on T2WI. Small（more than 20 mm） tumors showed obviously homogeneous enhancement after contrast injection, however, large （less than 20 mm） tumors showed obviously heterogeneous enhancement. Seven of those 8 tumors were accompanied by vascular flow voids or peritumoral edema. Conclusion The MRI findings of hemangioblastomas in the spinal cord are characteristic. MRI is valuable for establishing the diagnosis preoperately.