Ossifying fibroma of the femur is a benign tumor that grows on the thigh bone. Ossifying fibroma is composed of fibrous tissue and bone tissue, and is a benign tumor that develops in the long bones of the limbs and the maxillofacial bones, mostly in adolescents. Osteoblastic fibroma grows slowly and early symptoms are not obvious. As the tumor increases in size, it will cause pressure, deformation and resorption of the femur, affecting the quality of life of patients. Ossifying fibroma of femur is mainly treated by surgical resection. Smaller ossifying fibroma can be completely resected, larger ossifying fibroma can be partially resected, and bone graft reconstruction can be carried out according to the condition at a later stage, in order to restore the load-bearing role of the femur. If you are diagnosed with osteofibrosarcoma of the femur, it is recommended to treat it under the guidance of a doctor to avoid delaying the condition.