<prompt> Most common malignancy of bone is?SecondaryMultiple myelomaOsteoid osteomaOsteosarcoma  <response>: ANSWER: A secondaryREF: Apleys 8th edition page 191Most common malignancy of bone: secondariesMost common primary malignancy of bone: multiple myelomaMost common benign tumour of bone: osteochondromaMost common malignancy of bone in children and adolescents: osteosarcomaMost common benign true bone tumor: osteoid osteoma 