. _:b636429 . _:b738282 . _:b636429 _:b735677 . _:b738282 . _:b735677 _:b738282 . "Neoplastic Process"^^ . "Central Nervous System Extraskeletal Osteosarcoma"^^ . "Central Nervous System Extraskeletal Osteosarcoma"^^ . "C7002"^^ . "Osteosarcoma_of_the_Central_Nervous_System"^^ . "Osteosarcoma of Central Nervous SystemSYNCI" . "An osteosarcoma arising from the brain or spinal cord.NCI" . "Central Nervous System Extraskeletal OsteosarcomaPTNCI" . _:b735677 . "C1335150"^^ . "Osteosarcoma of the Central Nervous SystemSYNCI" . _:b636429 . "Malignant"^^ .