This book covers the full range of pathologic conditions encountered during childhood and youth, including tumors and tumor-like conditions of all organ systems, with direct links to developmental biology pathways and genetics. It provides a user-friendly road map to the main diagnostic criteria and combines an organ-related approach with an explanation of the diagnostic approaches to various specific diseases and syndromes, including sequential segmental analysis of congenital heart disease. More than 500 new full-color macro- and microphotographs using more than 500 multi-photographic panels are included to provide a realistic basis for comparison macroscopically and under the lens, and summarizing tables highlight key information in the concise form required for at-a-glance review. Pathologists will find the book very helpful when signing out complex and challenging cases, and it will also prove invaluable for exam preparation and continuing medical education.