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作 者:陈桦[1] 彭述文[2] 马艳[2] 林志春[2] 刘方颖[2] 蒋志祥[2] 陈翼[2]
机构地区:[1]湖南省儿童医院放射科,湖南长沙410007 [2]南方医科大学附属南方医院
出 处:《实用放射学杂志》2005年第10期1081-1083,共3页Journal of Practical Radiology
摘 要:目的探讨儿童髓母细胞瘤的MRI表现特点.方法收集经手术证实的髓母细胞瘤22例,其中男13例,女9例,年龄3~13岁.所有病例均行MRI平扫与增强扫描,并对其临床MRI表现进行回顾性分析.结果肿块位于小脑蚓部17例,位于小脑半球2例,位于第四脑室内3例,肿瘤内发生囊变10例.MRI扫描T1WI呈等或稍低信号,T2WI呈等或稍高信号,增强扫描呈中等或明显强化,2例沿脑脊液播散.MRI对儿童髓母细胞瘤的定位准确率为95.5%,定性准确率达90.9%.结论 MRI能提供肿瘤浸润的范围、继发改变及其与周围组织的关系,还能够做出明确的定位与定性诊断,此外,MRI还对髓母细胞瘤沿脑脊液种植转移的诊断具有重要诊断价值.Objective To evaluate MRI manifestations of children medulloblastoma. Methods 22 cases with medulloblastoma were conformed by surgery and pathology . There were 13 male and 9 female, the age ranged from 3 to 13 years. All cases were examined with plain and enhanced MRI , the clinical data and MRI of medulloblastomas were reviewed retrospectively. Results 17 case were located at eerebellar inferior vermis , 2 cases were located at the eerebellar hemisphere and 3 cases at the fourth ventricle , 1 0 cases had cystic component. On MRI, they appeared as low intensity or equal intensity signal on T1WI, T2WI showed equal or slightly high signal intensity, after contrast administration,all cases had middle or marked enhancement. Metastasis was spreaded along the eerebrospinal fluid in 2 cases. The accurate rate in localized and qualitative lesions was 9 5. 5 % and 9 0. 9 % respectively. Conclusion MRI can provide the informations of extent of invasion, secondary changes and relation with surrounding structures, MRI also can determine the location and accurate diagnosis of medulloblastoma. MRI plays an important role in diagnosing of the cerebrospinal fluid metastases of medulloblastomas.
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