患者男性 ,66岁。因头痛、恶心、呕吐半月于 1999年 7月 4日收入院。半个月前病人无明显诱因出现持续性全头痛 ,伴恶心、呕吐 ,当地医院行头颅ＣＴ检查无异常。拟“中枢神经系统感染”给予抗菌素治疗 10余天 ,症状无缓解 ,转入我院。既往无咳嗽、咳痰、胸痛等症状。查体 :Ｔ 36 Patient male, 66 years old. Due to headache, nausea, vomiting half moon on July 4, 1999 income hospital. Half a month ago, no obvious incentive for patients with persistent headache, nausea and vomiting, local hospital skull CT examination without exception. To be “central nervous system infection” given antibiotic treatment for more than 10 days, no symptoms, transferred to our hospital. Past no cough, sputum, chest pain and other symptoms. Physical examination: T 36