This book summarizes current knowledge of the biology and molecular pathogenesis of aggressive lymphomas and reviews the state of the art in diagnostic and therapeutic strategies. The aim is both to provide the reader with a sound understanding of the very significant progress that has been achieved in the understanding and management of these malignancies over recent years and to facilitate appropriate choice of the therapeutic strategy in individual cases. The assessment of different prognostic parameters are clearly presented in order to permits effective risk stratification that impacts on treatment choice. Recent insights into lymphomagenesis are exemplified and may assist in identifying emerging therapeutic targets.