👉 Myxosarcoma is a type of cancer that occurs in the bones and soft tissues. It is a rare form of sarcomas, which are tumors caused by abnormal cell growth. Myxosarcomas can occur anywhere in the body, but they most commonly affect the bones or cartilage in your arms, legs, hands, feet, fingers, or toes. They can also grow into the muscles and connective tissue around them. Myxosarcomas are usually treated