[A case of rectal cancer combined with intraperitoneal abscess responding completely to uracil/tegafur (UFT) plus oral leucovorin (LV) therapy].

The patient was a 55-year-old man who complained of lower abdominal pain and fever, and was admitted to an emergency clinic. His diagnosis was rectal perforation combined with intraperitoneal abscess. Because his condition was in the preseptic state, an emergency operation was performed for colostomy and abscess drainage. After operation, he was diagnosed with rectal cancer colonoscopically. He refused reoperation and selected an oral chemotherapy regimen (UFT+LV therapy). 18 months later, he underwent Hartmann's operation. Histologically, cancer cells were absent. Complete response to chemotherapy was confirmed. He is free from any sign of recurrence until now.