Leukemia, also known as A.L.L., is the most common cancer in children, adolescents, and young adults younger than 20 years old. It applies to several diseases of the blood-forming tissues, encountered in both sexes and at all ages. This book explains the different types of leukemia and what is currently known about the causes, symptoms, diagnosis, and treatment options for each. With full-color photographs and illustrations, this book offers the latest statistics along with information on new treatments, drugs, and future research.