OUTLINE: This is a randomized, multicenter study. Patients are stratified according to participating center, tumor type, disease stage, remission status (complete vs partial), prior therapy, progressive disease (yes vs no), and performance status (ECOG 0-1 vs 2). Patients are randomized into one of two treatment arms. Arm I: Patients receive vaccination with irradiated autologous tumor cells subcutaneously (SQ) on week 1 and then autologous tumor cell vaccine plus interferon gamma SQ on weeks 2 and 3, and then monthly beginning on week 8 and continuing until week 24. Arm II: Patients receive vaccination with irradiated autologous tumor cells as in arm I and then autologous tumor cell vaccine plus sargramostim (GM-CSF) SQ on weeks 2 and 3 and then monthly beginning on week 8 and continuing until week 24.