While osteosarcoma, chondrosarcoma, and multiple myeloma are all malignant tumors that affect bone, metastatic carcinoma is by far the most common malignant tumor found in bone. Bone metastases originate from primary cancers elsewhere in the body, most commonly from breast, prostate, lung, kidney, and thyroid cancers. Primary bone tumors are relatively rare compared to the incidence of metastatic disease to bone.
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