OBJECTIVES: I. Determine the toxicity and activity of cyclophosphamide, etoposide, total body irradiation, and autologous bone marrow transplantation in patients with relapsed or refractory non-Hodgkin's lymphoma. II. Determine the feasibility of pretransplantation cytoreduction with a regimen of high-dose cytarabine, cisplatin, and dexamethasone in this patient population. III. Determine the feasibility of posttransplantation radiotherapy given to sites of residual disease (involved-field "boost" irradiation) in this patient population.