“Soft tissue sarcomas form in cartilage, fat, muscle, blood vessels, tendons, nerves, and around joints. Osteosarcomas develop in bone; liposarcomas form in fat cells. Rhabdomyosarcomas form in muscle, and Ewing sarcomas form in bone and soft tissue.
About 22% of bone and joint cancer cases are diagnosed in those under age 20, while soft tissue cancers are more often diagnosed in those 55 years or older.”
American Association for Cancer Research – AACR (https://www.aacr.org/patients-caregivers/awareness-months/sarcoma-and-bone-cancer-awareness-month/)