慢性肝炎(简称慢肝)可由病毒、药物、酒精、自身免疫性疾病、遗传代谢障碍等病因引起.临床上慢肝以乙、丙型肝炎病毒感染所致者常见.但也常遇到一些慢肝患者肝炎病毒标志(甲、乙、丙、丁、戊、庚型)均阴性,为提高疗效,明确病因十分重要.其中部分可能有由尚未确定肝炎病毒(如HFV等)感染者,但不可否认大多数还是其他病因引起.现将有关疾病鉴别诊断讨论如下. Chronic hepatitis (referred to as slow liver) can be caused by viruses, drugs, alcohol, autoimmune diseases, genetic and metabolic disorders and other causes.Clinical slow liver to hepatitis B, hepatitis C virus infection caused by common, but often encountered some slow Liver patients with hepatitis virus markers (A, B, C, D, E, G) were negative, in order to improve the efficacy of a clear etiology is very important, some of which may have been identified by the hepatitis virus (such as HFV, etc.), but not Denied the majority or other causes of disease.Discussion on the diagnosis of disease are discussed below.