婴儿感染性外部性脑积水的CT表现及动态观察

笔者报告２７例婴儿感染性外部性脑积水，其典型ＣＴ表现为：纵裂前部及额顶区蛛网膜下腔增宽、脑底池扩大。通过对１０例复查ＣＴ动态观察发现，这是一种暂时性交通性脑积水（室外型），随病情变化可在短期内增多、减少或消失。笔者认为这对于颅内感染（特别是脑膜炎）的诊断是一个有意义的ＣＴ征像。结合文献对本病的发生机制、动态变化、ＣＴ表现与诊断进行了讨论。

CT FINDINGS AND DYNAMIC OBSERVATION OF INFECTIVE EXTERNAL HYDROCEPHALUS IN INFANTS

The authers report 27 cases of infective external hydrocephalus in infants.The typical CT findings are as follows:the front part of the interhemispheric fissure and subarachnoid space along the convexities are widening,the cerebral based cistern is enlarging.We found this is a form of transitory communicating hydrocephalus(extraventricular type) based on dynamic observations by reexamining CT in 1 0 cases.The hydrocephalus could aggravate,improve or disappear in accordance with changes of patient's clinical condition in a relatively short time.The authers suggest that it is a meaningful CT finding in diagnosing intracranial infection,particularly meningitis. The origin,dynamic changes,CT findings and diagnosis of this condition are discussed.