Objective: Explore and discuss the expression of hypoxia-inducible factor-1α( HIF-1α) and vascular endothelial growth factor( VEGF) in hepatocellular carcinoma as well as their correlations with tumor angiogenesis. Methods: The HIF-1α and VEGF expression in Forty-one cases of HCC tissue samples and 16 cases of nontumorous hepatic tissue samples were analyzed by immunohistochemistry streptavidin-peroxidase( SP) method. The anti-human mouse CD31 monoclonal antibody was adopted to mark the tumor vascular endot...