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Objective:To investigate the expressions of Beta-catenin,E-cadherin and MMP-7 and their implications in ovarian epithelial tumor.Methods:lmmunohistochemicai staining with SP method was conducted to identify the expressions of Beta-catenin,E-cadherin and MMP-7 in ovarian epithelial tumor in 66 cases.Results:The abnormal expression rate of Beta-catenin in malignant ovarian epithelial tumor was higher than those in borderline and benign epithelial tumors(P＜0.05).The positive rates of E-cadherin in benign and borderline ovarian epithelial tumors were significantly greater than that in malignant epithelial tumor.The expression rates of MMP-7 in malignant and borderline ovarian epithelial tumors were higher than that in benign epithelial tumor(P＜0.05).Conclusion:The abnormal expressions of Beta-catenin,E-cadherin and MMP-7 might be used to indicate the malignance transform of ovarian epithelial tumors,but they have no significant correlation with peritoneal dropsy invasion,caul invasion and appendant invasion in ovarian epithelial tumor.