For 10 years the book series Acute Leukemias has been providing updates on the rapid progress being made internationally concerning this group of diseases. The fifth volume mainly addressed experimental approaches, but the present issue presents both therapeutic and prognostic aspects of the most recent results from major multicenter clinical trials. Additional chapters report new trends in leukemia cell biology,the monitoring of minimal residual disease, and secondary leukemias, as well as new antileukemic drugs, antimicrobial strategies, and the use of cytokines. The combined efforts against acute leukemias described in this book explain the recent improvements in the outcome of patients suffering from acute leukemias.