OUTLINE: This is a randomized, open-label, multicenter study. Patients are stratified according to Karnofsky performance status (50-60% vs 70-100%), number of metastatic organs (1 vs 2 or more), and LDH value (up to 1.5 times upper limit of normal (ULN) vs greater than 1.5 times ULN). Patients are randomized to one of three treatment arms. Arm I: Patients receive leucovorin calcium IV over 2 hours followed by fluorouracil IV continuously over 22 hours on days 1 and 2. Arm II: Patients receive oxaliplatin IV over 2 hours on day 1. Arm III: Patients receive oxaliplatin IV concurrently with leucovorin calcium IV over 2 hours followed by fluorouracil IV continuously over 22 hours on day 1. Leucovorin calcium and fluorouracil are administered alone on day 2 on the same schedule as on day 1. Treatment repeats every 2 weeks for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients are followed for 30 days, every 2 weeks for up to 3 months, and then every 3 months thereafter.