Osteosarcoma is a type of bone cancer that primarily affects children and young adults. It usually develops in the long bones of the arms and legs, but can also occur in other bones. Osteosarcoma is characterized by the formation of malignant tumors in the bone tissue, which can lead to pain, bone fractures, and other complications. Treatment typically involves a combination of surgery, chemotherapy, and radiation therapy. Research in this area focuses on understanding the underlying causes of osteosarcoma, developing more effective treatments, and improving outcomes for patients with this disease.