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外部性脑积水（Externalhydrocephalus，简称EH）是发生在婴儿的一种特殊类型的非梗阻性脑积水。其CT表现有类似于脑萎缩之处，以往由于对本病缺乏足够的认识，常误诊为脑萎缩。我们从1992年5月至1994年5月共遇到资料完整的外部性脑积水12例，现小结如下，并结合文献对其发生机
External Hydrocephalus (EH) is a special type of non-obstructive hydrocephalus that occurs in infants. The CT findings are similar to brain atrophy, in the past due to the lack of adequate knowledge of the disease, often misdiagnosed as brain atrophy. We have encountered from May 1992 to May 1994 a total of 12 cases of exogenous hydrocephalus, are summarized as follows, combined with the literature on the occurrence of its machine