小脑脑桥角区肿瘤和瘤样病变的MRI诊断

MRI diagnosis of tumors and tumor-like lesions in cerebellopontile angle

目的 :提高小脑脑桥角 (c p角 )区肿瘤和瘤样病变的MRI诊断的准确性。方法 :对 10 5例经手术、病理证实的c p角区肿瘤患者采用 1.0T超导MRI系统行常规SE序列或快速SE序列T1加权和T2加权成像扫描 ,其中 80例加做Gd DTPA增强扫描。结果 :10 5例c p角区肿瘤和瘤样病变中 :听神经瘤 6 8例 ,脑膜瘤 17例 ,三叉神经瘤 11例 ,胆脂瘤 2例 ,蛛网膜囊肿1例 ,转移瘤 1例 ,脑干胶质瘤 2例 ,血管母细胞瘤 1例 ,室管膜母细胞瘤 1例 ,颈静脉体瘤 1例。c p角区肿瘤中最多见的是听神经瘤 (6 4 .8% ) ,其次是脑膜瘤 (16 .2 % )和三叉神经瘤 (10 .5 % ) ,该区肿瘤大部分有特征性的MRI表现。结论 :MRI是检查c p角区肿瘤和瘤样病变的首选方法 ,对c

Objective:To improve MRI diagnostic accuracy of tumor and tumor like lesions in cerebellopontile angle(c p a).Methods:One hundred and five cases of c p a tumors identified through surgical operation and pathological examination were tested with conventional MRI at 1.0 T superconductive MRI system,using SE or flash sequence and 80 cases of them were contrasted with enhanced scanning with Gd DTPA.Results:Among 105 cases of c p a tumors,acoustic neuroma were found in 68 cases,meningioma in 17,trigeminal neuroma in 11,cholesteatoma in 2,arachnoid cyst in 1,metastases in 1,brain stem glioma in 2,hemangioblastoma in 1,ependymoma in 1 and glomus jugular tumor in 1.Acoustic neuromas(64.8%) were the most in c p a tumors,the next were meningioma(16.2%) and trigeminal neuroma(10.5%).Most of them had a characteristic MRI apperance and could be diagnosed before operation.Conclusions:MRI is a method of first choice in detecting c p a tumors,it has significant value in diagnosis and differential diagnosis of the c p a tumors.