[A Case Report of Sigmoid Colon Cancer with Multiple Lung Metastases Successfully Treated with S-1].

A patient in his 70s was diagnosed with sigmoid colon cancer[pT3pN1cM1(PUL1), pStage IV ]for which he underwent sigmoid colectomy and received S-1 adjuvant therapy for the lung metastases. The patient received a total of 10 courses of S- 1, administered orally on days 1-14 of a 21-day cycle. The lung metastases showed a complete response, and the patient completed the S-1 chemotherapy. No recurrence of lung metastases was detected up to 6 months later.