This book expands  on the work of Dr. Lent Johnson, a major figure in the history of bone tumor  pathology and bone tumor radiology, and updates it to provide a comprehensive history of those fields. Dr. Johnson began work on this book in the early 1990s, at the end of his 52-year career at the Armed Forces Institute of Pathology (AFIP) in Washington, DC. Dr. Michael Mulligan worked with him there during his Army service as a Radiologist at the Walter Reed Army Medical Center. Dr. Johnson asked Dr. Mulligan to review his initial draft chapters, but Dr. Johnson died in 1998 and the work was never completed. Dr. Mulligan intention was  to complete it  in tribute. The book is structured with Dr. Johnson initial chapters describing the early history of the development of the specialties of bone  pathology and skeletal radiology with an emphasis on the research and teaching programs established at the AFIP. Dr. Mulligan then provides additional information on subsequent developments from the last 30+ years to provide a complete picture of the current state of the field. This is an ideal guide for pathologists, radiologists, and all other medical professionals interested in the history of these specialties.