OUTLINE: Donors undergo leukapheresis, and Epstein-Barr virus (EBV) specific cytoxic T lymphocytes are cultivated in vitro. Patients receive infusions of EBV specific cytotoxic T lymphocytes over 5 to 10 minutes on weeks 0, 2, and 4. Patients with stable disease and those achieving partial remission are followed weekly for signs of disease progression.