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[Neoadjuvant chemotherapy for gastric cancer with peritoneal dissemination].

An early detection and treatment of gastric cancer with peritoneal dissemination are rather difficult so that a clinical trial has been neglected. Therefore, we introduced a pre-operative peritoneal lavage diagnosis for gastric cancer patients with serosa-invaded tumors. Neoadjuvant chemotherapy was introduced to patients with positive cytology and with no non-curative factors except peritoneum. The neoadjuvant chemotherapy followed by surgery was done safely. The patients with the disappearance of CY and P factors due to neoadjuvant chemotherapy had a better prognosis than those with positive results of CY or R However, many of the patients with negative results from peritoneum eventually suffered a peritoneal recurrence. We started another protocol study with S-1 and an intra-peritoneal chemotherapy using docetaxel. The efficacy in the protocol result will be expected.