外部性脑积水临床和CT诊断（附28例分析）

CT Analysis of External Hydrocephalus (An Analysis of 28 Cases)

本文对２８例外部性脑积水（Ｅｘｔｅｒｎａｌｈｙｄｒｏｃｅｐｈａｌｕｓ，简称ＥＨ）患者进行临床和ＣＴ分析。ＥＨ主要ＣＴ表现为额顶区对称性蛛网膜下腔增宽，纵裂池前部增宽。基底池，鞍上池、外侧裂池可增大。ＥＨ在临床和ＣＴ表现方面须与脑萎缩，硬膜下积液鉴别诊断。ＥＨ多数预后良好，常在２～３岁自愈。其ＣＴ表现有特征性。

External hydrocephalus(EH) is a disease of non obstructive hydrocephalus which occurs in early infants. 28 cases were analysed by CT and clinically in this paper. The main appearance of EH are symmetrical widening of subarachnoid space at fronto parietal area, anterior part of longtudinal fissure cistern, enlargement of basal cistern,suprasellar cistern or lateral fissure cistern.These manifestations should be differentiated from cerebral atrophy and subdural fluid accumulation. The prognosis of majority of EH are good. Usually, it will be spontaneously cured by 2 to 3 years old. CT scanning has its specific manifestations and important value in the diagnosis of EH.