Hepatitis E virus (HEV) is one of the important causes of acute viral hepatitis worldwide, and its incidence rate is increasing year by year. HEV infection can lead to acute, subacute, or acute-on-chronic liver failure with a high mortality rate among some particular patient population, who are pregnant women, older, chronic liver diseases like chronic hepatitis B and cirrhosis, or immunocompromised. The clinical characteristics of HEV infection, the pathogenesis of HEV-related liver failure, and the progress in diagnosis and treatment will be elaborated upon in this article from these three aspects in order to improve clinicians' ability to identify and prevent HEV-related liver failure and its clinical outcomes.
戊型肝炎病毒（HEV）是导致全球急性病毒性肝炎的重要病因之一，且发病率有逐年上升趋势。部分特殊人群如孕妇、老年人、慢性肝脏疾病如慢性乙型肝炎和肝硬化等及免疫功能低下患者感染HEV后可导致急性、亚急性或慢加急性肝衰竭，病死率高。现从HEV感染的临床特点、HEV相关肝衰竭的发病机制以及诊治进展三个方面进行阐述，提升临床医师对HEV相关肝衰竭的识别和预防能力，改善其临床结局。.
Keywords: Hepatitis E virus; Liver failure; Pathogenesis; Research progress.