[A Case of Unresectable Gastric Cancer with Multiple Metastases Responding to Chemotherapy].

A 73-year-old man presented to a clinic complaining of upper abdominal pain with nausea and diarrhea. The patient was subsequently diagnosed with progressive gastric cancer: cT4a(SE), N3M1(H1P1), Stage IV . For first-line therapy, SP: S-1(120 mg, 3 weeks)and CDDP(90 mg, 8 days iv) were selected. Though the patient had Grade 3 thrombocytopenia and renal dysfunction, 13 courses were performed over 1 year 6 months. The primary lesion in the stomach showed complete response, while the metastatic foci in the liver reduced in size. Because of renal dysfunction and thrombocytopenia, 19 courses of SOX: S-1(80 mg, 2 weeks)and oxaliplatin(100 mg, 3 weeks)were administered for 1 year. Thereafter, S-1(80 mg, 4 weeks) was continued for 6 months. Appropriate administration of chemotherapy led to complete radiographic resolution of the gastric tumor, with survival currently approaching 3 years 6 months.