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探讨外部性脑积水（ＥＨ）的ＣＴ与临床表现特点及关系。材料与方法：搜集２４例ＥＨ的ＣＴ资料进行分析，并对其中１０例进行了临床与ＣＴ复查．结果：２４例ＣＴ上均有不同程度额顶部蛛网膜下腔增宽，大脑前纵裂增宽，并多伴有基底池扩大．复查显示，３个月全部为典型表现，６～１２个月ＣＴ征象逐渐减轻，２４个月大部分病例逐渐或完全恢复正常．临床症状随之减轻或消失．结论：ＥＨ是发生在婴儿早期的良性自愈性疾病，预后良好．
To investigate the characteristics and relationship of CT and clinical manifestations of external hydrocephalus (EH). Materials and Methods: CT data of 24 cases of EH were collected for analysis, and 10 of them were reviewed by clinical and CT. Results: In all 24 cases, the top of the subarachnoid space was broadened and the anterior longitudinal rupture was widened. The basilar pool was more often accompanied by enlarged. Review showed that all 3 months as a typical performance, 6 to 12 months CT signs gradually reduced, most of the 24-month cases gradually or completely returned to normal. Clinical symptoms then reduce or disappear. Conclusions: EH is a benign and self-healing disease that occurs early in infancy and has a good prognosis.