OBJECTIVES: I. Assess the response rate of AIDS-related lymphoma to ProMACE-CytaBOM (cyclophosphamide, doxorubicin, etoposide, prednisone, cytarabine, bleomycin, vincristine, methotrexate). II. Assess the toxic effects of ProMACE-CytaBOM in patients with AIDS-related lymphoma. III. Evaluate whether the incorporation of filgrastim (G-CSF) into the regimen allows treatment with full doses of the myelotoxic agents in these patients. IV. Determine whether intensive CNS treatment with intrathecal cytarabine and whole-brain irradiation prevents meningeal relapse or controls meningeal lymphomatous involvement in these patients.