椎管内脊髓外海绵状血管瘤的MRI诊断

MRI in the diagnosis of extramedullary cavernous angioma within spinal canal

目的:探讨椎管内脊髓外海绵状血管瘤的MRI表现,提高对本病的认识。方法:回顾性分析本院经病理证实的8例椎管内脊髓外海绵状血管瘤的MRl资料,并与临床及病理学资料作对照分析。结果:8例海绵状血管瘤中的7例位于硬膜外,1例位于髓外硬膜下;2例位于颈胸段,2例位于胸段,2例位于胸腰段,2例位于腰骶段。肿块多呈不规则形,2例包绕硬脊膜生长,4例突入相邻的椎间孔生长,病灶典型的MRI表现为T1WI呈等信号、T2WI呈高信号、T1WI增强扫描呈均匀强化。病理显示肿块为异常薄壁血管丛,腔呈圆形或不规则形,内含大量红细胞。结论:椎管内髓外海绵状血管瘤的MRI征象具有一定特点,MRI有助于椎管内髓外海绵状血管瘤的诊断与术前定位。

Objective：To study the MRI features of extramedullary cavernous angioma within spinal canal.Methods：The MRI materials of 8 patients having pathology proven extramedullary cavernous angioma within spinal canal were retrospectively analyzed and correlated with clinical features and histopathology.Results：Of the 8 cases,the locations were epidural（n=7）,sub-dural（n=1）;and the position were cervicothoracic junction,thoracic segment,thoracolumbar segment,lumbosacral segment for 2 cases each.Most of the masses were irregular in shape,the masses grew surrounding the spinal dura mater（n=2）,extended into the adjacent inter-vertebral foramen（n=4）.The typical MRI features were hyper-intensity on T2WI and iso-intensity on T1WI,enhanced markedly and homogeneously after contrast administration.Plenty of abnormal thin-walled vascular plexus with round or irregular shaped lumen,having lots of red blood cell inside were revealed on histo-pathology.Conclusion：Certain MRI characteristics could be assessed in extramedullary cavernous angioma within spinal canal,which is useful for the diagnosis and preoperative localization of the tumor.