Known central nervous system (CNS) lymphoma Medically apparent central nervous system lymphoma or leptomeningeal disease Central nervous system lymphoma or leptomeningeal infiltration Central nervous system (CNS) lymphoma or leptomeningeal infiltration Known central nervous system lymphoma. Known central nervous system (CNS) lymphoma Current central nervous system (CNS) lymphoma or leptomeningeal infiltration. Known central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma Known central nervous system lymphoma Known central nervous system (CNS) lymphoma Presence of central nervous system (CNS) lymphoma Prior therapy for central nervous system (CNS) lymphoma\r\n* Steroids not an exclusion Known central nervous system (CNS) lymphoma or leukemia Known central nervous system (CNS) lymphoma Central nervous system lymphoma, including lymphomatous meningitis Primary central nervous system (CNS) lymphoma Has known active central nervous system (CNS) lymphoma Has known active central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma Known central nervous system lymphoma Central nervous system (CNS) lymphoma Known active central nervous system lymphoma Active central nervous system lymphoma All patients with central nervous system lymphoma Patients with evidence of active central nervous system lymphoma Known central nervous system lymphoma Known central nervous system (CNS) lymphoma Active central nervous system lymphoma Known active central nervous system or leptomeningeal lymphoma Known history of, or clinically apparent, central nervous system (CNS) lymphoma or leptomeningeal lymphoma. Primary central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma or leukemia Patients should not have evidence of active central nervous system lymphoma All patients with central nervous system lymphoma. Lymphoma involving the central nervous system Lymphoma involving the central nervous system Known active central nervous system or leptomeningeal lymphoma Known central nervous system lymphoma, leptomeningeal lymphoma, or histologic evidence of transformation from an indolent lymphoma to a high-grade or DLBCL Current or past history of central nervous system lymphoma Patients with primary central nervous system (CNS) lymphoma Central nervous system lymphoma or leptomeningeal infiltration Known central nervous system lymphoma Known active central nervous system lymphoma or leptomeningeal disease Central nervous system lymphoma or leptomeningeal infiltration Participants with central nervous system (CNS) lymphoma Lymphoma involving the central nervous system Known central nervous system (CNS) lymphoma Known central nervous system lymphoma or leptomeningeal disease, except subjects with a history of central nervous system lymphoma treated and in remission > months Known central nervous system (CNS) lymphoma All patients with central nervous system lymphoma Known central nervous system lymphoma Known central nervous system (CNS) lymphoma Known central nervous system lymphoma All patients with history of central nervous system lymphoma Known active Central Nervous System (CNS) lymphoma. Primary central nervous system (CNS) lymphoma Medically apparent central nervous system lymphoma or leptomeningeal disease Central nervous system lymphoma or leptomeningeal disease Active central nervous system (CNS) lymphoma Known central nervous system lymphoma Known central nervous system lymphoma or ALL with central nervous system (CNS) involvement History of lymphoma involving the central nervous system Known central nervous system (CNS) lymphoma Central nervous system (CNS) lymphoma All patients with active central nervous system lymphoma Central Nervous System (CNS) Lymphoma or chronic immunosuppression-associated central nervous system (CNS) lymphoma. Medically apparent central nervous system lymphoma or leptomeningeal disease Primary central nervous system (CNS) lymphoma Central nervous system or leptomeningeal lymphoma Primary central nervous system (CNS) lymphoma Evidence of central nervous system lymphoma or lymphomatous meningitis Patients with active central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma, leptomeningeal lymphoma Known central nervous system lymphoma Diagnosis of primary central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma Known central nervous system (CNS) lymphoma History or current evidence of central nervous system lymphoma Known central nervous system (CNS) lymphoma or leukemia