Leukaemia is a complex group of diseases characterized by abnormal changes in any or several of the types of white blood cells. Because of the complexity of the various leukaemias, a systematic classification is essential to all involved in the study, analysis and assessment of the condition. This volume will be a comprehensive visual guide to the most important of the classifications to have evolved - the French-American_British (FAB) cooperative group classification. This system is used in Haematology departments throughout the world. But despite this widespread use, details of the system have yet to be contained in a single volume. Usually they form only a small section in Haematology atlases. This book contains important background information on use of cytogenetics, cytochemistry and monoclonal antibodies and explains the difficult concepts of the system clearly. As the book is highly illustrated (with 108 colour photographs) it will also be of use as an Atlas of Leukaemia Morphology.