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Japanese Journal of Clinical Oncology, Vol 28, Issue 1 16-19, Copyright © 1998 by Foundation for Promotion of Cancer Research

ORIGINAL ARTICLE

Weekly 24-hour infusion of high-dose 5-fluorouracil and leucovorin in patients with advanced colorectal cancer: Taiwan experience

WS Wang, PM Chen, TJ Chiou, JH Liu, JK Lin, TC Lin, WS Chen, JK Jiang, CC Yen, FS Fan and RK Hsieh
Department of Medicine, Veterans General Hospital-Taipei, Taiwan.

Between January 1994 and November 1995, 41 patients with metastatic colorectal carcinoma were enrolled in this study. All these patients had recurrent disease after a prior 5-fluorouracil based adjuvant chemotherapy or failed to achieve response by prior chemotherapy that included 5-fluorouracil. 5-Fluorouracil, 2600 mg/m2, was administered concurrently with 100 mg/m2 leucovorin over 24 hours of continuous intravenous infusion. The treatment was repeated every week until progressive disease was documented. Forty-one patients received a total of 810 courses of treatment. The overall response rate was 17.1% (95% confidence interval 5.6-28.6%). In two patients who achieved complete response, the liver was the metastatic site. The median survival was 18.4 months for responders and 12.6 months for non-responders. Gastrointestinal toxicities including diarrhea, stomatitis, nausea and vomiting were the major side-effects. Sixteen incidences (39.0%) of grade 2-3 gastrointestinal toxicities were observed. One patient (2.4%) developed a grade 3 cardiac toxicity, and another one (2.4%) had a grade 2 neurotoxicity. Hematological toxicities were minimal with no evidence of severe (grade 2 or more) leukopenia or thrombocytopenia. We conclude that in patients with pretreated metastatic colorectal cancer, weekly 24-hour infusion of high-dose 5-fluorouracil and leucovorin is associated with higher efficacy and tolerable toxicity. This regimen is a good option as a second-line treatment for those whose diseases are recurrent from or refractory to prior 5-fluorouracil, and deserves a longer period of follow-up.
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