Hematology in Clinical Practice,Third Edition,is writ-ten specifically for clinicians-students,residents in training,primary care internists or family practition-ers,and clinical hematologists/oncologyists.It is a prac-tical guide to the diagnosis and treatment of the most common disorders of red bolld cells.white blood cells,and hemostasis.Each disease state is discussed in terms of the underlying pathophysiology,clinical fea-tures that suggest the diagnosis,the use of state-of-the-art laboratory tests in the diagnosis and differential diagnosis of the condition,and current management strategies,For the student,specific chapters discuss a systematic approach to the workup of a patient with hematologic disease,providing a foundation for clini-cal training.We would like ot thank James McArthur and John Boller of the University of Washingtons Health Sci-ences Center for Educational Resources for the colorphotographs selected from the American Society of Hematology National Slide Bank; Catherine Hartung for the artwork; and Jacqueline Hedlund for her edito-rial assistance.