If ovarian cancer has spread, it is generally considered to be at an advanced stage. The treatment for advanced ovarian cancer primarily involves chemotherapy. Epithelial cancer, the most common type of ovarian cancer, is particularly sensitive to chemotherapy. Most patients benefit from chemotherapy. However, once ovarian cancer has spread and is not caught at a very early stage, even with treatments like chemotherapy, it cannot be cured. The purpose of treatment at this stage is to alleviate the patient's pain and extend their survival, but it cannot be cured.