<unk>  <unk>  is a type of cancer that is the most common soft tissue sarcoma of late adult life, most commonly occurring between age 50-70.  In rare cases<unk>  does occur in children, but it is usually in a less aggressive form. However, malignant  tumors have occurred in children as young as 13. It occurs more often in caucasians than those of African or Asian descent.  Its male:female predominance is 2:1.
Malignant fibrous histiocytoma
Alveolar soft part sarcoma
Osteoblastoma
Ewing's sarcoma
Malignant histiocytosis
Epithelioid sarcoma
Synovial sarcoma
Osteosarcoma