Objective:To investigate the expression and significance of CD147,MMP-9,and VEGF in salivary gland tumor tissues.Methods:From February 2010 to November 2017,120 paraffin samples were collected for examination after salivary gland surgery,including 80 cases of salivary gland malignant tumor,20 cases of salivary gland benign tumor,and 20 cases of normal salivary gland tissue.The normal salivary gland tissue was used as a control group.The expression of CD147,MMP-9 and VEGF were detected by SP immunohistochemi...