脂肪肝不是一个独立的疾病,它是多种因素引起脂肪在肝脏内过度蓄积,从而导致肝脏形态和功能上的改变。判断脂肪肝的标准有两项,一是肝脏中脂肪与肝脏的重量之比;二是组织学上肝细胞脂肪变性占肝细胞总数的比例。正常人肝脏的脂肪含量占肝脏重量的3%~5%,其中甘油三酯占肝脏重量1 Fatty liver is not an independent disease, it is a variety of factors that cause fat in the liver over-accumulation, resulting in liver morphology and functional changes. There are two criteria for judging fatty liver, one is the weight ratio of fat and liver in liver, and the other is the proportion of hepatocellular steatosis in total number of hepatocytes in histology. Normal liver fat content of the liver weight of 3% to 5%, of which triglycerides accounted for liver weight 1