Recurrent osteosarcoma and malignant fibrous histiocytoma (MFH) of bone are cancers that have recurred (come back) after being treated. The cancer may come back in the bone or in other parts of the body. Osteosarcoma and MFH most often recur in the lung, bone, or both. When osteosarcoma recurs, it is usually within 18 months after treatment is completed.
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