桥小脑角区病变的MRI表现  

MRI findings of lesions in the cerebellopontine angle

作　　者：平小夏[1] 孟倩[1] 田霞[1] 陆紫微[1] 谢道海[1] 

机构地区：[1]苏州大学附属第一医院放射科,江苏苏州215006

出　　处：《医学影像学杂志》2014年第1期12-15,20,共5页Journal of Medical Imaging

摘　　要：目的探讨桥小脑角(cerebellopontine angle,CPA)区占位性病变在磁共振检查中的影像表现。方法分析83例行MRI平扫+增强检查,且经手术病理证实,具有完整临床资料的CPA占位性病变的MRI表现,重点观察病灶的大小、形态、边缘轮廓、瘤周水肿、周围结构的改变、平扫及增强后的信号强度。结果本组83例CPA病变中,听神经瘤50例,脑膜瘤13例,表皮样囊肿13例,三叉神经瘤4例,蛛网膜囊肿1例,星形细胞瘤1例,室管膜瘤1例。肿瘤位于左侧CPA区38例,右侧CPA区45例。术前定位准确率为98.8%,定性准确率为95.2%。结论 MRI检查是检查桥小脑角区占位性病变的首选方法,对该区病变的诊断和鉴别诊断有重要价值。Objective To investigate the MRI features of lesions in the cerebellopontine angle. Methods 83 patients with lesions in the CPA were confirmed by pathology, the MR imaging features of them were analysed. Results In 83 ca ses, 50 cases were acoustic neuroma, 13 cases were meningioma, 13 cases were epidermoid cyst, 4 cases were trigeminal neuroma, 1 case was arachnoid cyst, 1 case was strocytoma, and 1 case was ependymoma. 38 lesions were located in the left CPA, 45 lesions were located in the right CPA. Compared with pathological results, the accuracy rates of location and qualitative diagnosis were 98. 8% and 95. 2%. Conclusion MRI can be used as the first choice for detecting the CPA tumors, and it has a high value in the diagonosis and differential diagnosis of CPA tumors.

关 键 词：桥小脑角区病变 磁共振成像 

分 类 号：R739.41[医药卫生—肿瘤]