extraneous hydrocephalus的用法和样例：
例句
- Due to their characteristic location and tendency toward enlargement, associated obstructive hydrocephalus is common.
因为他们的特征性位置和增大的趋势，常见继发性阻塞性脑积水。 - Resolution of infection may be followed by adhesive arachnoiditis with obliteration of subarachnoid space leading to obstructive hydrocephalus.
感染的溶解可能引起粘连性蛛网膜炎，粘连性蛛网膜炎使蛛网膜下腔变小甚至消失，最后造成梗阻性脑积水。
