TABLE 1.

International Classification of Diseases for Oncology, Third Edition Codes used to identify osteosarcoma

Code	Description
9180/3	Osteosarcoma NOS (not otherwise specified)
9181/3	Chondroblastic osteosarcoma
9182/3	Fibroblastic osteosarcoma
9183/3	Telangiectatic osteosarcoma
9184/3	Osteosarcoma in Paget's disease of bone
9185/3	Small cell osteosarcoma
9186/3	Central osteosarcoma
9187/3	Intraosseous well differentiated osteosarcoma
9192/3	Parosteal osteosarcoma
9193/3	Periosteal osteosarcoma
9194/3	High‐grade surface osteosarcoma
9195/3	Intracortical osteosarcoma