Objective: To study the expression and relation of NO and iNOS in ovarian cancer,and the relationship of iNOS with the biological behaviors of ovarian cancer and the expression correlation of ID1 to iNOS. Methods: The method of nitrifying ferment was tested for the concentration of NO in normal ovarian tissue,benign ovarian tumor and ovarian cancer tissue. The expression of iNOS and ID1 proteins was detected by immunohistochemical staining( SP method). Results: The concentration of NO was significantly high...