After complete removal of ovarian cancer, there is still a possibility of recurrence, especially in patients with high-risk factors. The recurrence rate can be quite high, for example, if there was rupture of the capsule, low differentiation of the pathology, presence of tumor tissue on the surface of the ovary, severe adhesion of the tumor to the surrounding areas, cancer cells found in the abdominal lavage fluid, or presence of vascular tumor thrombus and nerve invasion. Even after total removal, recurrence can still occur.