椎管内脊髓外海绵状血管瘤的MRI诊断

摘要

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 epi-dural (n=7),sub-dural (n=l)jand 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 T, WI, 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.%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MRI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T1W1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.