There are benign ovarian tumors and malignant ovarian tumors. Malignant ovarian tumors are ovarian cancer, so ovarian tumors include ovarian cancer. The difference between benign tumors and malignant tumors is mainly in the following aspects: 1. the course of disease, benign tumors have a longer course and grow more slowly, while ovarian malignant tumors have a shorter course and grow more rapidly. 2. the location and nature of the tumor, benign tumors are usually unilateral and cystic and smooth. Ovarian cancer is bilateral, substantial, irregular and fixed. 3. benign tumors do not have ascites, while malignant tumors often have ascites and malignant cells may be detected. benign tumors are generally in good condition, while ovarian cancer patients may be emaciated or cachectic.