[A case of advanced gastric cancer with multiple liver metastases successfully treated with TS-1/low-dose CDDP/lentinan combination chemotherapy].

: We report herein a case of advanced gastric cancer successfully treated with TS-1/low-dose CDDP/Lentinan combination chemotherapy. A 74-year-old male suffering from anorexia was admitted to our hospital and diagnosed as having type 2 gastric cancer metastasizing to the liver. TS-1 was orally administered at 100 mg/body/day for 28 days with a 14-day interval as one session. During the second session, because grade 1 thrombocytopenia was noted, administration of TS-1 was rescheduled to every other day. CDDP was infused at 10 mg/body/day on day 6 to 10, 13, 15, and 17. After his discharge, CDDP at 10 mg/body and Lentinan at 2 mg/body were weekly infused as ambulant patient chemotherapy. The abdominal CT scan showed reduction of hepatic tumors by 86% in three months and 97% in 16 months. Metastatic lymph nodes disappeared in 4 months. The primary tumor was reduced and flattened to a cicatrix, and endoscopic biopsy revealed no cancer cells. The tumor markers, CEA (716.9 ng/ml) and CA 19-9 (57.2 U/ml), were reduced to normal range. The therapeutic efficacy was judged as a partial response (PR), which lasted for 16 months without severe adverse effects. He maintained good quality of life. This combination chemotherapy was thought to be beneficial for patients with advanced gastric cancer.