CT扫描对脑转移瘤的诊断正确率达90%以上,这在以前有过许多报道,但对囊性转移瘤诊断有一定困难,特别对未查出原发肿瘤的单发囊性病灶更显困难。为提高对囊性脑转移瘤的认识及鉴别诊断,将哈尔滨市第一医院自1997年3月至2009年7月诊断的21例较典型病例报告如下。1临床资料21例中 CT scan for the diagnosis of brain metastases, the correct rate of 90% or more, which in the past have been many reports, but the diagnosis of cystic metastases have some difficulties, especially for unselected primary cystic lesions more significant difficult. To improve the understanding of cystic brain metastases and differential diagnosis, the first hospital in Harbin since March 1997 to July 2009 diagnosis of 21 cases of more typical cases are reported as follows. 1 clinical data in 21 cases