[A case of metastatic acsending colon cancer showing sustained complete response to chemotherapy with SOX and followed UFT]. 
A 72-year-old woman was diagnosed as Stage IV ascending colon cancer, with metastasis of lung and para-aortic lymph node.  She received laparoscopic assisted right hemicolectomy for the local control.  After the operation, we performed chemotherapy.  We report a case of metastatic ascending colon cancer showing complete response(CR)to 3 courses of S-1/ oxaliplatin(SOX)regimen, and maintaining a CR status while being followed with UFT for 20 months.