The correct answer is
vertebral bodies. Bone cancer is a very rare type of cancer which can begin in any bone in the body. Most commonly it affects the pelvis or the long bones in the arms and legs. There are different types of bone cancer, osteosarcoma (osteoid tissue in the bone), chondrosarcoma (in cartilaginous tissue), the Ewing Sarcoma. Bone metastasis results from primary tumor invasion to bone (from epithelial tumors). The most common sites of bone metastases are the spine and pelvis.