Osteosarcoma and Ewing sarcoma are bone cancers that primarily affect children, teens, and young adults. Symptoms they share include bone pain, stiffness, and swelling at the tumor site. About 2% of ...

Osteosarcoma is a type of bone cancer. It can develop at any age, but most cases occur during childhood, early adolescence, and young adulthood. In young people, osteosarcoma tends to develop in the ...