摘要：
目的 通过观察肺癌患者小脑脑膜广泛种植转移的MR表现,分析其特点.方法 使用飞利浦 1. 5T MR常规扫描及增强扫描,对32例小脑脑膜广泛种植转移进行诊断分析,总结其MR表现特点.结果 25例出现双侧小脑较对称性广泛种植转移,5例出现双侧小脑不对称广泛种植转移,2例出现单侧小脑转移;30例出现双侧小脑呈花斑样或播散样强化,其中有25例呈较对称性广泛强化,32例均无明显占位效应,28例无明显瘤周水肿,仅4例少许水肿. MR各序列诊断分别为T1WI 19例,T2WI 20例,增强30例,T1WI、T2WI与增强诊断率比较差异有统计学意义(P＜0. 05).结论肺癌患者小脑脑膜广泛种植转移,多数为双侧小脑较对称性广泛种植转移,绝大多数呈花斑样或播散样强化,所有病例均无明显占位效应,大多数无瘤周水肿,增强扫描诊断肺癌小脑脑膜广泛种植转移具有重要意义.%Objective To analyze the characteristics of extensive implant metastasis of cerebellar meninges in patients with lung cancer by observing the MRI manifestations of it. Methods 32 cases of extensive implant metastasis of cerebellar me-ninges were diagnosed and analyzed by Philips 1. 5T conventional and contrast-enhanced MRI,and their MRI features were summa-rized. Results There were 25 cases of bilateral cerebellar symmetrical extensive implantation metastasis,5 cases of bilateral cere-bellar asymmetrical extensive implantation metastasis and 2 cases of unilateral cerebellar metastasis;In 30 cases,bilateral cerebel-lum showed blotchy or diffusion-like enhancement,of which 25 cases showed more symmetrical and extensive enhancement. There were no obvious space occupying effect in all 32 cases,28 cases had no obvious edema around the tumor,and only a little edema was found in 4 cases. The diagnosis of MR sequences were T1WI in 19 cases,T2WI in 20 cases and enhancement in 30 cases. There was significant difference among T1WI,T2WI and enhanced diagnostic rate(P＜0. 05). Conclusion The majority of lung cancer patients with extensive implant metastasis of cerebellar meninges were bilateral and symmetrical,most of which were plaques or diffusion-like enhancement. There was no significant space occupying effect in all cases,most of which didn't have peritumoral e-dema. Enhanced scanning was of great significance in the diagnosis of lung cancer patients with extensive implant metastasis of cer-ebellar meninges.
