GPT and neoplasm: Elevated GGT was associated with male (P = 0.002), alpha fetoprotein(AFP)>20μg/L (P = 0.046), ALT>40U/L (P = 0.001), AST>40U/L (P < 0.001), tumor size >5 cm (P < 0.001), tumor encapsulation (P = 0.018) and TNM stage (P < 0.001).