Heated Intraperitoneal Chemotherapy and Gastrectomy for Gastric Cancer With Positive Peritoneal Cytology

Heated Intraperitoneal Chemotherapy (HIPEC) with gastrectomy using cisplatin, mitomycin C and sodium thiosulfate

Cisplatin (90 mg/m\^2) will be administered via circuit to the peritoneal cavity

Mitomycin C 10 mg/m\^2 will be administered via circuit to the peritoneal cavity

Sodium thiosulfate will be administered by continuous intravenous infusion starting immediately prior to the chemotherapy perfusion and continuing for a total of 12 hours.

At screening, baseline (if not done at screening) and operation (as clinically indicated).

At screening, baseline (if not done at screening), post op care, post-discharge visits/follow-up, semi-annual follow-up and annual follow-up.

At screening, baseline (if not done at screening), post op care, post-discharge visits/follow-up, semi-annual follow-up and annual follow-up.

If computed tomography (CT) contraindicated.

At screening and baseline (if not done at screening).