单发脑转移瘤的CT诊断

CT diagnosis of single brain metastasis

目的:提高对单发脑转移瘤(SBM)的CT诊断和鉴别诊断的准确性。材料和方法:分析经临床及病理证实的38例SBM的CT平扫及增强表现。结果:本组SBM幕上占92.1%,右侧大脑占73.7%。瘤体位于脑皮质及皮质下区占84.2%,且常明显强化。环状强化占65.8%,结节状强化占31.6%。幕上中、重度瘤周水肿占86.8%。结论:SBM常见于幕上脑皮质及皮质下区,右侧多见;常呈环状及结节状明显强化,环壁厚薄不均,形态常不规则,结节状强化密度常不均匀,指状瘤周水肿显著,瘤体较小时瘤周水肿常较明显。

Objective:To improve accuracy of diagnosis of CT and differen ti ation in SBM.Materials and Methods:The CT findings of plain scans and contras t enhanced scans of the pathologically confirmed SBMs(38cases)were analysed .Re sults:The supratentorial SBMs were92.1%.The right cerebrum was73 .7%.The lesions in the cerebral cortex and subcortical region were86.8% .Most SBMs were circular (65.8%)or nodal (31.6%)with obvious enh ancement and edema around the metastasis.Conclusions:The SBM is common seen in the cere...