Results of treatment of far advanced and recurrent stomach cancer with TS-1

摘要

We used TS-1 as first-line therapy to treat 44 patients with far advanced or recurrent gastric cancer, and assessed the results and safety. One treatment cycle consisted of TS-1, 80 mg/m2/day, for 28 days followed by a 14-day rest period. The efficacy rate in the cases capable of being evaluated was 30.1% (11/36), and 25.0%, (7/28) when TS-1 was used as monotherapy. The efficacy rate was lower than in a phase II study, however, the median survival time (MST) of 10.7 months for the patients as a whole, the 1-year survival rate of 43.2%, and the 2-year survival rate of 20.5% were favorable. There were many NC cases in which long-term therapy was possible, and they contributed to the long-term survival. The incidence of adverse events was 84.1%, but the incidence of grade 3 or more events was low at 13.6%. Since TS-1 is highly efficacious and safe, as well as convenient because of being an oral preparation, it appears that it can be ranked as the drug of first choice for chemotherapy of far advanced or recurrent gastric cancer.