One vs Three HIPEC Cycles After CRS for Pseudomyxoma Peritonei

Inclusion Criteria: 1. Voluntarily consent to participate, sign informed consent, and be willing and able to comply with the study protocol; 2. Age 18-70 years; 3. Undergo CRS+HIPEC with pathological diagnosis of PMP of high grade with signet-ring cells, high grade, or low grade; 4. Karnofsky performance status (KPS) \>60; 5. Adequate function of major organs as follows: 1. Hematology: WBC ≥3.5×10\^9/L, ANC ≥1.0×10\^9/L, LC ≥0.5×10\^9/L, PLT ≥80×10\^9/L, Hb ≥90 g/L; 2. Hepatic function: AST, ALT, and TBIL ≤2×upper limit of normal (ULN); 3. Renal function: serum creatinine \<1.2×ULN; 4. Coagulation: APTT ≤1.5×ULN; INR or PT ≤1.5×ULN; 5. Cardiopulmonary function sufficient to tolerate major surgery and HIPEC; (5) Radiological Peritoneal Cancer Index (PCI) ≥15; (6) No local or systemic antitumor therapy within 1 month prior to CRS+HIPEC; (7) Adverse reactions from prior treatments have resolved before study initiation or, in the investigator's judgment, will not interfere with this study; Exclusion Criteria: 1. Metastases to lung, brain, bone, or liver; 2. AST, ALT, or TBIL ≥2×ULN; 3. Serum creatinine ≥1.2×ULN; 4. Severe mesenteric contraction; 5. Major organ dysfunction that cannot support the planned procedures; 6. Concomitant hematological disorders or other malignancies; 7. Acute or subacute infectious disease; 8. History of allergy to cisplatin or docetaxel, or marked allergic diathesis or severe allergy history; 9. Psychiatric or psychological disorders preventing cooperation with treatment and efficacy evaluation; 10. Any other condition deemed unsuitable for enrollment by the investigator;