临床资料患者男,46岁。因“头痛、头晕1个月加重伴智力下降、记忆力下降5d”就诊入院。患者入院前1个月(2009年7月28日)无明显诱因出现发热、头痛,为持续性钝痛,以双额、顶、枕为著,无放射痛,无规律;体温最高38.5℃。考虑为上呼吸道感染,给予抗炎对症治疗,3d后体温正常,头痛明 Clinical data Patient male, 46 years old. Due to “headache, dizziness 1 month aggravated with mental decline, memory loss 5d” hospitalized. One month before admission (July 28, 2009), there were no obvious causes of fever and headache. They were persistent dull pain, with double volume, top and occipital as the no radiation pain and irregularity. The maximum body temperature was 38.5 ℃. Considered as upper respiratory tract infection, given anti-inflammatory symptomatic treatment, normal body temperature after 3d, headache Ming