HIPEC Combined With Sintilimab for Gastric Cancer With Peritoneal Metastasis

"1. HIPEC: HIPEC is performed after laparoscopic exploration, Mitomycin 30mg/m2, d1, Docetaxel 40mg/m2, d3, Oxaliplatin 65mg/m2, d5 within a week after surgical exploration.~2. Chemotherapy(SOX) and anti-PD-1 antibody Sintilimab (Tyvyt®) treatment followed (4 cycles): SOX regimen: Oxaliplatin: 130 mg/m\^2, IV, d1; S-1, 40-60 mg/m\^2 bid, po, day 1-14, every 3 weeks for a total of 4 cycles; Sintilimab (Tyvyt®) 200mg fixed dose every 3 weeks, for a total of 4 cycles.~3. Surgery: Imaging and secondary surgical exploration, assess the patient's condition and consider whether perform the cytoreductive surgery (resection of primary tumors and metastases). For patients undergoing surgery, HIPEC for three cycles followed, Mitomycin 30mg/m2, d1, Docetaxel 40mg/m2, d3, Oxaliplatin 65mg/m2, d5 within a week after surgery; For inoperable patients, continue to use standard chemotherapy of guidelines recommend.~4. After the surgery, continue to use standard adjuvant chemotherapy."