外部性脑积水 (externalhydrocephalus ,EH )是发生于婴儿时期中的一种良性自愈性疾病 ,为特殊类型的交通性脑积水。过去由于对此病缺乏认识 ,常与硬膜下积液或脑萎缩相混淆 ,常致误诊[1] 。随着CT普遍应用 ,对此病认识提高 ,诊断逐渐增多。现将我院 1999～ 2 0 0 1年资料完整E External hydrocephalus (EH) is a benign and self-healing disease that occurs in infancy. It is a special type of traffic hydrocephalus. In the past due to the lack of awareness of the disease, often with subdural effusion or brain atrophy confused, often misdiagnosed [1]. With the widespread use of CT, awareness of the disease increased, the diagnosis gradually increased. Now my hospital 1999 ~ 2001 data integrity E