1　病例报告男 ,38岁。因头痛、呕吐 ,伴视力下降、行走不稳 6个月于1997- 0 4- 0 3到我院就诊。查体 :神志清 ,反应迟钝 ,表情淡漠 ,双眼底视乳头边界不清 ,余正常。头颅 CT扫描见脑室广泛扩大 ,双侧脑室额角、左侧脑室三角区及脑干周围低密度区 ,双侧脑室额角有一液平 ,双顶 1 case report Male, 38 years old. Due to headache, vomiting, with decreased visual acuity, unsteady walking 6 months in 1997- 0 4- 0 3 to our hospital. Physical examination: Conscious, unresponsive, apathetic, binocular end of the nipple unclear, more than normal. Head CT scan to see a broad expansion of the ventricle, bilateral forehead, left ventricular trigone and brainstem around the low density area, the frontal of the bilateral ventricle have a level, double top