Malignant tumors of ovary mostly do not have obvious clinical symptoms in early stage, once obvious masses are found, they are mostly middle and late stage tumors. The clinical symptoms of ovarian malignant tumor can be as follows: 1. Patients have abdominal distension, ovarian tumor will lead to obvious abdominal distension or fluid in the abdominal cavity or pelvic fluid. 2. Patients have abdominal bulge when the mass is relatively large, accompanied by tumor compression, resulting in clinical manifestations such as back pain and leg pain or bilateral lower limb edema and vulvar edema. 3. 4. Ovarian malignant tumor will lead to endocrine abnormalities in women, so patients will have abnormal menstruation, such as heavy menstruation, prolonged menstruation, ovulatory bleeding or irregular vaginal bleeding. 5. Patients will have systemic wasting manifestations in the late stage of tumor, such as wasting, weakness of limbs, jaundice, skin pigmentation. 6. 6. If there is metastasis, it will be accompanied by clinical symptoms of the metastatic site, such as abnormal stool and abnormal urine, etc.