title: [Malignant tumors originating in the bone among relatively older patients--cases and keypoints in diagnosis].
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000175:diagnosis*; D002813:Chondrosarcoma / Q000175:diagnosis; D005260:Female; D005354:Fibrosarcoma / Q000175:diagnosis; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D012516:Osteosarcoma / Q000175:diagnosis