[A case of nonresected gastric cancer with peritoneal dissemination maintained on TS-1, cisplatin (CDDP) and docetaxel combination chemotherapy with good QOL].

A 64-year-old woman was admitted to the hospital for abdominal fullness and constipation. In the pelvic cavity, an abdominal CT scan revealed massive ascites showing malignancy on histological examination. Upper GI endoscopy revealed type 3 gastric cancer from the anglus to the cardia. A barium-enema showed a stenotic lesion at the sigmoid colon due to peritoneal dissemination. An abnormally high CA125(1,400 mg/ml) level was detected in serum. We performed systemic chemotherapy of TS-1, CDDP and peritoneal infusion of docetaxel on the nonresected gastric cancer with peritoneal dissemination. After 2 cycles, cytology of ascites revealed no malignancy, and the serum CA125 value regained its normal level. After 3 cycles, the killer cell effect was recognized by laparoscopic examination and the stenotic change of sigmoid colon had almost disappeared. The patient clinically achieved good QOL by this method, which was very effective for nonresected gastric cancer with peritoneal dissemination.