后颅窝肿瘤的MRI诊断与鉴别诊断(附180例分析)  

MRI Diagnosis and Differential Diagnosis of Posterior Fossa Tumors:analysis of 180 cases

作　　者：刘智勇[1] 孙志刚[1] 张秀芳[1] 

机构地区：[1]内蒙古民族大学附属医院,内蒙古通辽028000

出　　处：《内蒙古民族大学学报（自然科学版）》2010年第4期450-454,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

摘　　要：目的:分析后颅窝肿瘤的MRI表现,总结后颅窝肿瘤的MRI特征,以提高后颅窝肿瘤的诊断和鉴别诊断.方法:收集后颅窝肿瘤180例,全部病例均经手术及病理证实.结果:本组180例肿瘤中,位于桥小脑角区88例(左侧53例、右侧35例),位于小脑半球49例(左侧22例、右侧27例),位于中线区43例,其中脑膜瘤42例、听神经瘤37例、胶质瘤30例、转移瘤22例、髓母细胞瘤7例、表皮样囊肿8例、蛛网膜囊肿7例、三叉神经瘤7例、血管网状细胞瘤6例、室管膜瘤5例、海绵状血管瘤4例、脉络丛乳头状瘤3例、脊索瘤2例.术前定位准确率为100%,定性准确率达97.2%.结论:MRI对后颅窝肿瘤的诊断和鉴别诊断具有较高的临床应用价值,可为后颅窝肿瘤提供详细的术前信息.Objective： To improve the diagnosis and differential diagnosis of posterior fossa tumors through analyzing its MRI findings and summarizing its MRI features.Methods： 180 cases of posterior fossa tumors were all confirmed by surgery and pathology.Results： 88 cases were in cerebellopontine angle（53 left,35 right）,49 cases were in cerebellar hemisphere（22 left and 27 right）,43 patients were in the midline area.There were 42 meningiomas,37 acoustic neuromas,30 gliomas,22 metastatic tumors,7 medulloblastomas,8 epidermoid cysts,7 arachnoid cysts,7 trigeminal nerve tumors,6 hemangioblastomas,5 ependymomas,4 arachnoidcysts,3 choroid plexus papillomas,2 chordomas.The preoperative locating accuracy rate was 100% and qualitative accuracy rate was 97.2%.Conclusion： MRI has a high clinical value in diagnosis and differential diagnosis of the posterior fossa tumors,which can provide detail preoperative information for doctors.

关 键 词：磁共振成像 后颅窝肿瘤 诊断 

分 类 号：R739.4[医药卫生—肿瘤]