Secondary Cytoreduction Followed by Chemotherapy Versus Chemotherapy Alone in Relapsed Ovarian Cancer After PARPi Maintenance Treatment: a Multicentre, Open-label, Randomised, Phase 3 Trial

Inclusion Criteria:

1. Patients with diagnosis of first-line or second-line recurrent epithelial ovariancarcinoma, peritoneal carcinoma, or fallopian tube carcinoma, who has previouslyreceived at least 4 cycles of platinum-based chemotherapy in initial treatment;
2. Relapse occurred after 6 month since platinum-based chemotherapy;
3. PARPi maintenance therapy for more than 6 months before relapse;
4. R0 ideal debulking in initial surgery;
5. PET-CT indicate the recurrence lesion is isolated and not exceed 5 sites, and theascites is less than 500ml;
6. ECOG/WHO Performance score of 0 to 1;
7. No hepatic failure, bilirubin ≤ 1,5 time the Normal limit, ASAT and ALAT ≤ 3 time theUpper Normal Limit
8. No Renal insufficiency (serum creatinine < 1,5 time the normal limit, creatinineclearance > 80 mL/min). calculated with MDRD method
9. Hematology function: PNN ≥ 1,5x10⁹/L, platelets ≥ 100x10⁹/L
10. No contraindication to general anaesthesia for heavy surgery
11. Patients having read, signed and dated Informed consent before any study procedure

Exclusion Criteria:

1. Platinum-refractory/uncontrolled epithelial ovarian cancer;
2. Non-epithelial ovarian tumor, mucinous, serous-mucinous (mainly mucinous), malignantBrenner tumor, low-grade serous carcinoma, borderline tumor;
3. Suffering from other malignant tumors that have not achieved complete remission in thepast 2 years;
4. Received radiotherapy within 2 weeks before the start of the study intervention;
5. General conditions cannot tolerate secondary cytoreduction;
6. Severe hypersensitivity reactions (≥ grade 3) to paclitaxel or platinum and/or any ofits excipients.