- Group A: Patients undergo primary surgery comprised of hysterectomy, bilateral salpingo-oophorectomy (BSO), omentectomy, and resection of all tumor masses, if possible, before beginning chemotherapy. Patients with residual disease greater than 1 cm after completion of primary surgery receive 3 courses of chemotherapy, followed within 6 weeks by interval debulking surgery, followed within 3 weeks by the fourth course of chemotherapy.