Objective:To investigate the expression and significance of CD147,MMP-9,and VEGF in salivary gland tumor tissues.Methods:From February2010to November2017,120paraffin samples were collected for examination after salivary gland surgery,including80cases of salivary gland malignant tumor,20cases of salivary gland benign tumor,and20cases of normal salivary gland tissue.The normal salivary gland tissue was used as a control group.The expression of CD147,MMP-9and VEGF were detected by SP immunohistochemical method.Results:Protein positive expression rates for CD147,MMP-9,and VEGF:salivary gland malig...