Cancer and its treatment can compromise bone health, leading to fracture, pain, loss of mobility, and hypercalcemia of malignancy. Bone metastasis occurs frequently in advanced prostate and breast cancers, and bony manifestations are commonplace in multiple myeloma. Osteoporosis and osteopenia may be consequences of androgen-deprivation therapy for prostate cancer, aromatase inhibition for breast cancer, or chemotherapy-induced ovarian failure. Osteoporotic bone loss and bone metastasis ultimately share a pathophysiologic pathway that stimulates bone resorption by increasing the formation and activity of osteoclasts. Important mediators of pathologic bone metabolism include substances produced by osteoblasts, such as RANKL, the receptor activator of nuclear factor kappa B ligand, which spurs osteoclast differentiation from myeloid cells. Available therapies are targeted to various steps in cascade of bone metastasis.
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| http://dx.doi.org/10.6004/jnccn.2009.0080 | DOI Listing |
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