This trial is studying giving bortezomib together with dexamethasone, ifosfamide, carboplatin, and etoposide to see how well it works with or without rituximab in treating patients with relapsed or refractory AIDS-related non-Hodgkin lymphoma. Patients much have confirmed relapsed or refractory HIV-associated NHL, must have documented HIV seropositivity, and must have EBV- and/or HHV-8-positive infection within the lymphoma.

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