Evaluation Compared with traditional NACT, whether PIPAC can increase the incidence of CRS3 determines the rationality of choosing PIPAC.

Inclusion Criteria:

1. Patients with high-grade serous adenocarcinoma (HGSOC) with FIGO stage IIIC-IVA.
2. Age between 18 and 70.
3. Patients were evaluated with Fagotti score and MD Anderson score. MD Anderson score was consistent with Fagotti score ≥ 8, which was evaluated as high tumor load, because the initial curative resection could not achieve R0 resection and NACT was selected; or patients could not tolerate the initial surgery due to severe complications and NACT was selected.
4. Normal renal function (blood creatinine: 58-96 μmol/L).
5. No bone marrow suppression (HBG ≥ 110 g/L, white blood cell count ≥ 4.0×109/L, neutropenia Granulocyte count greater than or equal to 2.0x109/L and platelet count greater than or equal to 100x109/L).
6. Normal liver function (bilirubin 3.4-22.2 μmol/L, ALT 7-40 U/L, AST 13-35 U/L, AST/ALT≤ 1.5）。
7. World Health Organization Performance status score (WHO score) 0-2 points.

Exclusion Criteria:

• 1) Patients with other malignancies or have received any form of chemotherapy, radiotherapy and targeted therapy for this disease in other hospitals.

  2) Diagnose complete intestinal obstruction. 3) Subjects who rely entirely on parenteral nutrition. 4) Subjects with decompensated ascites; 5) Subjects with severe abdominal infection (peritonitis); 6) Subjects with extensive adhesions in the abdominal cavity; 7) Subjects who underwent tumor debulking surgery and gastrointestinal resection reconstruction simultaneously; 8) Subjects with portal vein thrombosis; 9) Patients with severe or uncontrolled medical conditions and infections (including atrial fibrillation, angina pectoris, heart Functional insufficiency, ejection fraction less than 50%, difficult to control hypertension, etc.); 10) Allergy to chemotherapy drugs in the past; 11) Patients with serious cardiopulmonary, liver and kidney, blood system or mental illness and drug abuse; 12) Expected life is less than 12 weeks. 13) Patients who have participated or are currently participating in other clinical trials within 3 months; 14）Other conditions that the researchers judged the patient to be unsuitable for inclusion.