- Histologically or cytologically confirmed diagnosis of: a) Advanced solid tumor malignancy that is not responsive to standard therapies or for which there is no standard therapy; OR b) B-cell or T-cell lymphoma (excluding HIV-associated lymphoma) that has relapsed or is refractory after prior chemotherapy or radiotherapy and autologous or allogeneic bone marrow transplantation (if appropriate) AND/OR for which salvage chemotherapy, radiotherapy, or bone marrow transplantation is not indicated or has been refused by the patient.