Effective biomodulation by leucovorin of high-dose infusion fluorouracil given as a weekly 24-hour infusion: results of a randomized trial in patients with advanced colorectal cancer.

Response rate, TTP, and overall survival were superior for LV-containing regimens compared with IFN modulation alone. The addition of IFN to high-dose infusional FU plus LV offers no advantage and may increase toxicity. The regimen of high-dose infusional FU24h/LV warrants further evaluation in patients with metastatic colorectal cancer.