Bone tumor is an inexact term, which can be used for both benign and malignant abnormal growths found in bone, but is most commonly used for primary tumors of bone, such as osteosarcoma. It is less exactly applied to secondary, or metastatic tumors found in bone.
Bone tumors may be classified as "primary tumors" which originate in the bone, and "secondary tumors" which originate elsewhere.
