外部性脑积水的CT随访观察

CT Follow-up Observation of External Hydrocephalus

目的：探讨外部性脑积水（EH）的发展规律及预后情况。材料与方法：选择资料完整的EH63例，分别在3个月、6个月、9个月、1岁、2岁和3岁时进行头颅CT复查。结果：EH可以在生后数天发生，3～6个月时为EH的典型期，9个月～1岁时开始好转恢复，2岁前基本恢复正常。CT征象上，恢复正常的顺序依次为蛛网膜下腔、鞍上池、环他和纵裂池，外侧裂恢复最慢。结论：①EH为一自限性病征，多在2岁前恢复正常。②抽搐与EH的严重程度密切相关。

Objective: To make a further study of the naed course and prognosis of external hylerephalus (EH) with CT scanning. Materisls and Methods:For this study, 63 cases with complete clinical data were colected. Craniocerebral CT scanning was performed in all patients at the age of 3rd 6th, 9th month and at 1st, 2nd, 3rd years. Results: EH could be demonstrated within first several days after birth, while typical changes of EH appeared at 3～6th months. Recovery began from 9～12th months and retumed to normal befere the patient was two years old. Tha recovering sequence was as follows: first, subarachnoid space, supraseller cistem, cistem ambiens, followed by cistem of longitudinal fissure of cerebrum, and, finally, the cistema of bilateral lateral fissures of cerebrum. Conclusion: (1) EH is a seir-limited entity, most cases restore to normal condition before the patient is two years old. (2) Convulsion in closely related to the severity of the disease.