[A case of colorectal cancer showing complete response to UFT].

A 33-year-old male patient underwent a low anterior resection for sigmoid colon cancer. Bloody stool developed about one month after discharge and a small, circumscribed, ulcerated adenocarcinoma was found about 1 cm anal to the site of anastomosis. After oral administration of FT 0.6 g/day for 42 days, UFT 0.6 g/day was administered successively. As a result, complete tumor response was observed within about four months. UFT 0.3 approximately 0.6 g/day has been administered daily since then. The patient has been in good health without any sign of relapse for three years after achievement of the complete response.