正常情况下,脂类含量约占肝重的3～5％,若含量超过肝湿重的10％,或组织学上肝实质脂肪浸润超过30～50％,称为脂肪肝。近30年来国内外统计患病率约为0.06～7.8％。引起脂肪肝的原因很多,全身性疾病、消化道或肝脏本身疾患,均可致本病,常见者如病毒性肝炎、糖尿病、酗酒、营养不良、妊娠、药物等。目前,国内病毒性肝炎发病率较高,其合并高脂血症和脂肪肝也较常见,后者降低了肝细 Under normal circumstances, the lipid content of about 3 to 5% of liver weight, if the content of more than 10% of liver wet weight, or histologically liver parenchymal fat infiltration of more than 30 to 50%, known as fatty liver. The prevalence of statistics at home and abroad in the past 30 years is about 0.06 ~ 7.8%. Cause of fatty liver for many reasons, systemic diseases, digestive tract or liver itself disease, can cause the disease, common such as viral hepatitis, diabetes, alcoholism, malnutrition, pregnancy, drugs and so on. At present, the incidence of viral hepatitis in China is higher, and its combination of hyperlipidemia and fatty liver is also more common, which reduces the fine liver