Peripheral Stem Cell Transplantation in Treating Patients With Relapsed Low- or Intermediate-Grade Non-Hodgkin's Lymphoma

RATIONALE: Peripheral stem cell transplantation may be able to replace immune cells that were destroyed by chemotherapy or radiation therapy. Treating the peripheral stem cells in the laboratory to remove any existing cancer cells may improve the effectiveness of the transplant. PURPOSE: Randomized phase II trial to compare the effectiveness of treated peripheral stem cells with that of untreated stem cells in patients who have relapsed low- or intermediate-grade non-Hodgkin's lymphoma.