Newly Diagnosed Mature B-ALL, Burkitt's Lymphoma and Other High-grade Lymphoma in Adults

The study evaluates the efficacy and tolerability of alternating short cycles of high-dose and conventional chemotherapy in combination with rituximab in CD20 positive patients, followed by local radiation therapy in the case of initial mediastinal or central nervous system (CNS) involvement or a residual tumor after chemotherapy. A dose-reduced regimen is offered for patients estimated to be over 55 years, biologically.