Androgen-deprivation therapy is well-established for treating prostate cancer but is associated with bone loss and an increased risk of fracture. Matthew R. Smith and an international team investigated the effects of denosumab, a fully human monoclonal antibody against receptor activator of nuclear factor-{kappa}B ligand, on bone mineral density and fractures in men receiving androgen-deprivation therapy for nonmetastatic prostate cancer. In today’s New England Journal of Medicine, August 20, they report positive results: