特发性外部性脑积水的CT诊断及跟踪观察

目的 探讨特发性外部性脑积水的CT诊断及跟踪观察价值。方法 回顾性分析18例病因不明的小儿特发性外部性脑积水的CT表现跟踪变化。结果 双侧额或额顶部蛛网膜下腔对称性增宽者18例(100％)，双侧裂池增宽者18例(100％)，额顶区脑沟增宽加深者16例(88．89％)，前纵裂池增宽者18例(100%），脑基底池扩大者14例(77．78%），脑室轻度扩大者3例(16．67％)。1岁时CT复查，18例(100％)均出现外部性脑积水战少。2岁6个月时再次复查CT平扫，18例中15例(83．33％)外部性脑积水消失，另外3例(16．66％)外部性脑积水进一步减少。结论 CT检查及跟踪观察对于特发性外部性脑积水的诊断及鉴别诊断有重要价值。

CT diagnosis of and observation on idiopathic hydrocephalus

Objective To explore the diagnostic value of CT onidiopathic hydrocephalus and to dynamically observe the disease.Methods CT images and its dynamic changes of 18 new borninfants with idiopathic hydrocephalus were retrospectivelyanalyzed. Results Bilateral subrachnoid cavities in frontal andfrontoparietal parts symmetrically broadened in 18 cases (100%),so did bilateral fissure cisterns(100%) and anterior longitudinalcistern(100%).While frontoparietal gyri broadened and deepenedin 16 cases(88.89%),basal cistern enlarged in 14 cases(77.78%),ventricles of brain slightly enlarged in 3 cases(16.67%).CTfollow-up showed that hydrocephalus reduced in 18 cases at 1year,disappeared in 15 cases (83.33%)and further reduced in theremaining 3 cases(16.66%) at 2 1/2 years. Conclusion CT is ofgreat value in the diagnosis and differential diagnosis of idio-pathic hydrocephalus.