Since 1987 Acute Leukemias (AL) has regularly reported on the state of the art in the rapidly growing, successful and exciting field of biology and management of these diseases. In this volume large multicenter clinical trials again form the solid basis for the investigation of leukemic cell biology, the detection of biologic subgroups, their differential response to alternative treatment strategies and the further development of therapy. In particular, this volume addresses mechanisms of chromosomal translocations and transcription factors, risk-adapted treatment strategies, differentiation therapy, secondary AL, special aspects in older patients, and adoptive immunotherapy. Besides the antileukemic approaches, supportive treatment with new antimicrobial substances and growth factors is updated. As a forum of worldwide activities in the field of AL this volume contains both exhaustive overviews on major clinical issues and preliminary data and hypotheses not previously published.