This book deals with the pathologic diagnosis of malignant and benign bone tumors. The final chapters are devoted to extra-skeletal skeletogenic tumors and pseudo-tumoral lesions that may be confused with true tumors. To emphasis the indissoluble nature of the anatomic and clinical relations, the discussions are preceded by one or two clinical cases. The author imparts his personal experience without ignoring the material in the literature on the subject. Over 1100 radiographic and histologic illustrations. The references mention recent studies but also review the classical studies leading to definition of the various disease entities. The chief differential diagnoses and the pitfalls to be avoided are reviewed in an insert at the end of each chapter.