[A case of gastric cancer complicated with multiple lung metastases responding to TS-1].

A 56-year-old gastric cancer patient with multiple lung metastases and dilated cardiomyopathy was treated by chemotherapy with TS-1. This case was judged to be unresectable. TS-1 (100 mg/body/day) was orally administered for 4 weeks followed by a drug-free 2-week period as 1 course. At the completion of 3 courses, the multiple lung metastases were assessed to show a complete response (CR). There were no side effects and no hospitalization. This chemotherapy is being continued, and a CR in the lung and no change of the gastric cancer have been maintained for 15 months (10 courses).