RATIONALE: Drugs used in chemotherapy such as fludarabine use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Peripheral stem cell transplantation may be able to replace immune cells that were destroyed by chemotherapy or radiation therapy. Sometimes the transplanted cells can reject the body's normal tissues. Donor lymphocytes that have been treated in the laboratory may prevent this.