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[Role of Palliative Chemotherapy for Peritonitis Carcinomatosa of Inoperable Advanced Gastric Cancer].

We report a case of peritoneal dissemination of gastric cancer in which the QOL was maintained with a less-than-optimum dose of anticancer agent. A 64-year-old man underwent total gastrectomy for corpus gastric cancer without distant metastasis performedas an open-laparotomy. Peritoneum disseminations were observed in the left sub-diaphragmatic space and back side of the mesocolon, andthe tumor passedd irectly to the superior mesenteric vein of transverse mesocolon. As a first- line chemotherapy, G-SOX therapy(S-1 80mg/day/body and oxaliplatin 100mg/m2)was administered for 15 courses. After these courses, the disease was categorized as PD. Next, RAM/PTX(ramucirumab 8mg/kg andpaclitaxel 80mg/m2) were administered as second-line chemotherapy. However, the PTX, especially causedprolongedad verse effects such as G4- leveledbloodtoxicity andsevere general fatigue. Therefore, we administereda lower dose of PTX than the original optimal minimum dose. This lower dose chemotherapy resulted in effective changes such as decreased pain and general fatigue and resolution of the bloodtoxicity. As a result, the patient's QOL improved, and his condition has been maintained as SD for 2 years after the operation. For these reasons, this ordinary chemotherapy may be used as a palliative chemotherapy.