Skeletal disease in the elderly.
D000368:Aged; D000375:Aging; D001847:Bone Diseases; D001859:Bone Neoplasms / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy; D006801:Humans; D009362:Neoplasm Metastasis; D010001:Osteitis Deformans / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy; D010018:Osteomalacia / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy; D010024:Osteoporosis / Q000453:epidemiology / Q000517:prevention & control / Q000628:therapy