By means of crossed immuno-affinoelectrophresis,serum fucosylated AFP(Fuc AFP)was determined in 167 cases, including primary hepatic carcinoma (PHC) (72 cases), various liver diseases(54 cases), other gastrointestinal tumors (4 cases),and healthy controls (37 cases) .The results showed that serum fucosylation index of AFP (FucI) was significantly higher in PHC than in controls and other diseases (P