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[A case of liver and para-aortic lymph node metastasis of colorectal cancer responding to S-1].

A 78-year-old woman was diagnosed with liver and para-aortic lymph node metastasis of colorectal cancer via abdominal computed tomography (CT) during a post-operative follow-up. She and her family declined intensive chemotherapy. Therefore, reduced S-1 (80 mg/body/day) was administered for 2 weeks followed by a 2 week interval. After 5 courses, CT revealed a complete response for the liver metastasis and a partial response for the para-aorticlymph node metastasis. Twenty-four courses of chemotherapy were completed, and only a follow-up CT examination was performed. The paraaorticlymph node grew larger, but the liver metastasis did not reappear. Herein, we report a case that showed a good response to S-1.