为探讨第五、六脑室的临床意义，以９０４７例脑ＣＴ资料中证实有五、六脑室者１１２例（占１．２％），进行分析。并观察了部分病人脑脊液、脑电图的变化、发现２７例患者的临床症状肯定与第五、六脑室有关，且这组患者的第五、六脑室更为宽大，均为先天性，５１例有后天因素（外伤、脑动脉瘤破裂），提示第五、六脑室形成，除先天发育异常外，也有可能与外伤等因素有关，在临床诊治中应重视第五、六脑室的临床意义。 In order to explore the clinical significance of the fifth and sixth ventricle, 112 out of 9047 brain CT data confirmed that there were five or six ventricle (1.2%) were analyzed. And observed changes in cerebrospinal fluid and electroencephalogram in some patients. The clinical symptoms of 27 patients were definitely related to the fifth and sixth ventricle, and the fifth and sixth ventricle of this group were more generous. All were congenital and 51 There are acquired factors (trauma, aneurysm rupture), prompted the fifth and sixth ventricle formation, in addition to congenital dysplasia, but also may be related to trauma and other factors, in the clinical diagnosis and treatment should pay attention to the clinical significance of the fifth and sixth ventricle.