musculoskeletal and connective tissue disorders
Primary Malignant Bone Tumors
Fibrosarcoma and undifferentiated pleomorphic sarcoma (formerly malignant fibrous histiocytoma of bone)
Fibrosarcomas and undifferentiated pleomorphic sarcoma have similar characteristics to Osteosarcoma (osteogenic sarcoma) but produce fibrous tumor cells (rather than bone tumor cells), affect the same age group, and pose similar problems. Treatment and outcome for high-grade lesions are similar to osteosarcoma. 