Introduction -- Bone-forming tumors -- Cartilage-forming tumors -- Giant cell tumor -- Round cell tumor -- Fibrous tumors -- Fibrohistiocytic tumors -- Vascular Tumors -- Adamantinoma -- Notochordal tumors -- Leiomyosarcoma -- Adipocytic tumors -- Neurogenic tumors -- Phosphaturic mesenchymal tumor -- Metastatic carcinoma involving bone -- Tumor-like lesions and other conditions that simulate primary tumors.