title: Femur replacement.
mesh_terms: D000293:Adolescent; D000328:Adult; D004359:Drug Therapy, Combination; D005266:Femoral Neoplasms / Q000188:drug therapy / Q000601:surgery*; D005269:Femur / Q000601:surgery*; D006801:Humans; D007595:Joint Prosthesis; D002955:Leucovorin / Q000008:administration & dosage; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage; D012516:Osteosarcoma / Q000188:drug therapy / Q000601:surgery*
chemical_list: D002955:Leucovorin; D008727:Methotrexate