OUTLINE: Vaccinations begin at day 100 or up to 6 months after hematopoietic stem cell transplantation. Patients receive autologous lymphoma-derived idiotype vaccine plus keyhole limpet hemocyanin subcutaneously (SC) on day 1. Sargramostim (GM-CSF) SC is administered on days 1-4. Treatment repeats every 4 weeks for 4 doses, followed 12 weeks later by the fifth and final dose.