Therefore we propose a modification of the DCF regimen using IP docetaxel, intravenous cisplatin and oral TS-ONE in the treatment of gastric cancer patients with PC. We aim to study the maximum tolerated dose (MTD) and the recommended dose (RD) of IP docetaxel while using fixed doses of cisplatin and TS-ONE. Data on treatment efficacy will also be recorded. By far there is no study on IP chemotherapy in Hong Kong.