正常肝内脂肪含量仅占肝重的2～4%,其中60%为磷脂,其余大部分为中性脂肪(甘油三酯),还有少量胆固醇、游离脂肪酸。过量的脂肪(主要为甘油三酯)在肝内持久积聚,称为脂肪肝。肝细胞因脂肪沉积可引起结构和成分的改变,进而影响其机能。脂肪肝并不少见,据国外报告,在10,970份肝活检标本上,有脂肪肝改变者2907份,占26.5%。但由于其临床表现缺乏特殊性,易被误诊为其他急、慢性肝病而给予不合理治疗, Normal liver fat content accounts for only 2 to 4% of liver weight, of which 60% is phospholipid, most of the rest is neutral fat (triglyceride), as well as a small amount of cholesterol, free fatty acids. Excess fat (mainly triglycerides) persists in the liver and is called fatty liver. Liver cells due to fat deposition can cause structural and composition changes, thereby affecting its function. Fatty liver is not uncommon, according to foreign reports, in 10,970 liver biopsy specimens, there are 2907 fatty liver changes, accounting for 26.5%. However, because of its lack of specificity of clinical manifestations, easily misdiagnosed as other acute and chronic liver disease and given irrational treatment,