OUTLINE: This is a dose escalation study of ras peptide cancer vaccine. Patients receive ras peptide cancer vaccine mixed with immunological adjuvant QS21 subcutaneously monthly for 4 doses, every 2 months for 4 doses, every 4 months for 3 doses, every 6 months for 2 doses, and then annually thereafter in the absence of unacceptable toxicity. Cohorts of 3 to 6 patients receive escalating doses of ras peptide cancer vaccine until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which at least 2 of 3 or 2 of 4 patients experience dose limiting toxicity.