Bone Tumors — A Challenge for Cooperation..- I. Experimental Tumors.- Comparative Pathology of Bone Tumors in Animals, with Particular Emphasis on the Dog.- Bone Tumors Induced by Inhalation of 238PuO2 in Dogs.- Experimental Induction of Bone Tumors by Short-Lived Bone-Seeking Radionuclides.- II. Pathogenesis.- Etiology of Childhood Bone Cancer: Epidemiologic Observations.- The Endogenous Origin and Transmission of RNA Viral Genomes that Code for Cancer.- Pathogenesis of Radiation and Virus-Induced Bone Tumors.- III. Pathology.- The WHO Classification of Bone Tumors.- Primary Malignancy, Secondary Malignancy and Semimalignancy of Bone Tumors.- Common Errors Made by Pathologists in the Diagnosis of Bone Tumors.- Aspiration (Puncture or Needle) Biopsy in Bone Lesions.- Cytologic and Cytochemical Behavior of Primary Malignant Bone Tumors.- Histochemical and Electron-Microscopic Aspects of Bone Tumor Diagnosis.- IV. Immunology.- Morphological, Biological, Immunological and Biochemical Studies on Bone Tumors of Animals and Man.- Immunologic Aspects of Human Sarcomas.- The Immune-Status in Patients with Bone and Soft-Tissue Sarcomas.- Laboratory Models of Minimal Residual Cancer: Development and Preliminary Immunotherapy Studies.- V. Therapy.- The Treatment of Malignant Bone Tumors by Conservative Surgery.- Management of Osteogenic Sarcoma at the Mayo Clinic.- Surgical Treatment of Solitary Bone Cysts.- Resection of Malignant Bone Tumors.- Giant-Cell Tumors and Chondrosarcomas: Grading, Treatment and Results (Studies of 209 and 131 Cases).- X-Ray Therapy of Primary Bone Tumors.