散发性脑炎的首发症状各异,故早期常易误诊为精神分裂症、癔病、脑瘤、脑血管病、结核性脑膜炎、脑脓肿及乙型脑炎等。当前本病尚无特异性诊断方法,其主要诊断依据是临床表现。现参照各地的诊断标准及1982年11月在重庆召开的全国散发性脑炎座谈会的精神,概括为以下几点供诊断时参考: 1.急性或亚急性起病。 Sporadic encephalitis of the first symptoms vary, so early misunderstanding often misdiagnosed as schizophrenia, hysteria, brain tumor, cerebrovascular disease, tuberculous meningitis, brain abscess and encephalitis and so on. Currently no specific diagnosis of this disease, the main diagnosis is based on clinical manifestations. Reference is made to the diagnostic criteria of all localities and the spirit of the national sporadic encephalitis symposium held in Chongqing in November 1982, which is summarized as the following reference for diagnosis: 1. Acute or subacute onset.