[A Case of Long-Term Complete Remission with Solitary Metastasis Following Surgery and Chemotherapy for Ascending Colon Cancer].

We report a rare case of a solitary metastasis in which long-term complete remission was achieved with chemotherapy alone. An 81-year-old woman underwent a right hemicolectomy and D3 lymph node dissection for ascending colon cancer. Pathological findings showed type 2, 40×20 mm, tub2>muc, pT3, int, INF b, ly1, v0, pN1(1/32), pPM0, pDM0, and fStage Ⅲa. However, the patient chose not to undergo adjuvant chemotherapy and opted for further observation. Five months after the surgery, lymph node metastasis was observed near the right external iliac artery. Because the patient did not wish to undergo surgical treatment, SOX therapy was initiated. Owing to considerable side effects, the patient's treatment was switched to oral S-1. Gradually, the lesion disappeared, and the treatment was changed to UFT. The patient has maintained complete long-term remission for 10 years postoperatively. Here, we report this case along with a literature review.