Neoplasms, Bone TissueHistiocytoma, Benign FibrousHistiocytoma, Malignant FibrousHistiocytomaOsteosarcomaGlioblastomaBrain NeoplasmsBone and BonesBone NeoplasmsGliomaFemoral NeoplasmsSoft Tissue NeoplasmsBone RemodelingChondrosarcomaSarcomaBone Marrow CellsHistiocytic SarcomaSkull NeoplasmsBone ResorptionBone DensityBone MarrowLiposarcomaRetroperitoneal NeoplasmsChordomaAngiomatosisSarcoma, EwingBone TransplantationMyxosarcomaOsteoblastomaSpinal Neoplasms