36例儿童髓母细胞瘤影像诊断比较与临床分析

Imaging diagnosis and clinical analysis of medulloblastoma in 36 children

目的：分析儿童髓母细胞瘤影像学特征，比较ＣＴ、ＭＲＩ诊断准确性。材料和方法：收集１９９４～１９９８年经手术证实的髓母细胞瘤３６例，其中男３０例，女６例，年龄９月～１５岁，其中小于１４岁３０例，１４～１５岁６例。分别行ＣＴ／ＭＲＩ检查，ＣＴ检查平扫／强化为３６／２５，ＭＲＩ检查平扫／强化２４／２０例。结果：髓母细胞瘤显示率、定位准确率均为１００％，定性准确率为９１９％，其中３例术前定性误诊。比较两种检查方法，ＣＴ与ＭＲＩ对肿瘤均能明确作出定位定性诊断，ＭＲＩ多轴位成像，显示毗邻关系较清，且不受后颅凹伪影干扰，对肿瘤诊断优于ＣＴ。结论：ＣＴ和ＭＲＩ相结合，能更全面提供临床诊疗信息，有利于鉴别诊断，具有重要诊断价值。

Objective:To analyze the imaging characteristics of medulloblastoma in children and compare the diagnosing accuracy of CT and MRI.Materials and Methods:36 medulloblastoma cases which were comfirmed by operation in 1994-1998,thirty males,six females,aged from 9 months to 15 years,performed CT/MRI,CT scanning/enhancement 36/25,while MRI 24/20.Results:the revealing rate and accuracy of locating were 100%,and accuracy was 91.9%,3 cases were misdiagnosed before operation.As to medulloblastoma,both CT and MRI can diagnose accurately,MRI can also show the relationship of tumor and peripheric structure clearly,so MRI is superior to CT.Conclusion:Combination of CT and MRI can provide information of diagnosis and treatment.It is helpful for differiental diagnosis.