Cancer from other parts of the body can spread to bone, most commonly affecting the spine, pelvis, and long bones. Bone metastases are typically associated with advanced cancer and are rarely found as an entirely unexpected first finding in a person with no symptoms. Occasionally, early bone involvement may be identified on imaging before pain or other symptoms develop. An MRI may show changes in bone that could be consistent with secondary spread. Finding bone metastases early may allow for faster staging and treatment planning before structural bone damage occurs. MRI is highly sensitive for detecting bone marrow involvement and early bone metastases, often identifying changes before they are visible on X-ray.
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