患者,女,43岁,于1990年10月2日入院,5个月前无原因出现头昏,走路不稳,经治疗病情减轻。2月前病情渐加重,17天前出现头痛,恶心呕吐、站立时呕吐加重为喷射状。既往身体健康。入院查体:血压正常、神清、有语清晰,双眼底视乳头轻度水肿、无眼震,余硕神经无异常。四肢感觉正常,四肢肌张大较低、肤力正常四肢肌张大较低,肤力(?)、双侧指鼻及眼膝胫试验不稳准,(?)线左右摇晃。双(?)检查脑脊液压力及常规,生(?)头颈CT平扫于20～30mm层面见小(?)密度区CT值30～45Hu,周围可以(?)小肿带,第四脑室受压前移,第三及侧脑室 The patient, female, 43 years old, was admitted to hospital on October 2, 1990 and was dizzy for five months and walked unsteadily. After treatment, his condition was relieved. Two months ago, his condition became heavier, with headache and nausea and vomiting 17 days earlier. In the past, good health. Admission examination: normal blood pressure, clear, clear language, mild bilateral edema of the bottom of the eye, no nystagmus, Yu Shuo neural abnormalities. Limbs feel normal, lower extremity muscle tone, normal skin tone lower extremity, skin tone (?), Both sides of the nose and knee and knee tibia test is not accurate, (?) Line left and right shaking. (?) Check the cerebrospinal fluid pressure and routine, raw (?) CT scan of the head and neck at the level of 20 ~ 30mm see small (?) Density CT value of 30 ~ 45Hu, around can be? Forward, third and lateral ventricle