title: Roentgenographically "benign" but rapidly lethal diaphyseal osteosarcoma; a case report.
mesh_terms: D000293:Adolescent; D001706:Biopsy; D005260:Female; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging* / Q000401:mortality / Q000473:pathology; D006801:Humans; D008175:Lung Neoplasms; D009362:Neoplasm Metastasis; D012516:Osteosarcoma / Q000000981:diagnostic imaging* / Q000401:mortality / Q000473:pathology; D011859:Radiography