急性病毒性脑炎常以发热、头痛、全身不适等上呼吸道感染的表现为首发症状 ,而以精神异常首发者则少见。我们1998年 10月～ 1999年 3月共收治 9例以精神障碍为首发症状的病毒性脑炎患者 ,就诊时均按精神疾患收入院 ,现将临床诊治过程及误诊原因分析如下。1　临床资料　　本组中 Acute viral encephalitis often fever, headache, general malaise and other upper respiratory tract infection performance as the first symptom, while those with mental abnormalities are rare. We from October 1998 to March 1999 were treated with 9 cases of mental disorders as the first symptom of viral encephalitis in patients with psychiatric hospital income, now the clinical diagnosis and treatment of misdiagnosis as follows. 1 clinical data in this group