No significant differences were noted regarding age, sex, BMI, history of hepatitis B, Child-Pugh classification of liver function, preoperative AFP, preoperative CA19-9, preoperative TBIL, preoperative Hb, preoperative ALB, preoperative PLT, tumor size, tumor number, type of AH, extent of resection and pathological result between the two groups (All P > 0.05). This evidence concerns the gene GSTM1 and neoplasm.