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Assessment and management of bone health in women with oestrogen receptor-positive breast cancer receiving endocrine therapy

Position statement of the Endocrine Society of Australia, the Australian and New Zealand Bone & Mineral Society, the Australasian Menopause Society and the Clinical Oncology Society of Australia

Women receiving adjuvant aromatase inhibitors and the subset of premenopausal woman on tamoxifen have accelerated bone loss and increased fracture risk. Both bisphosphonates and denosumab prevent bone loss; additionally denosumab has proven anti-fracture benefit.

Women considering endocrine therapy need fracture risk assessment, including clinical risk factors, biochemistry and bone mineral density (BMD) measurement, with monitoring based on risk factors. Weight-bearing exercise, vitamin D and calcium sufficiency are recommended routinely. Antiresorptive treatment should be considered in women with prevalent or incident clinical or morphometric fractures, a T-score (or Z-scores in women < 50 years) of < -2.0 at any site, or if annual bone loss is ≥ 5%, considering baseline BMD and other fracture risk factors.

Duration of antiresorptive treatment can be individualized based on absolute fracture risk. Relative to their skeletal benefits, risks of adverse events with antiresorptive treatments are low. Skeletal health should be considered in the decision-making process regarding choice and duration of endocrine therapy. Before and during endocrine therapy, skeletal health should be assessed regularly, optimized by non-pharmacological intervention and, where indicated, antiresorptive treatment, in an individualized, multidisciplinary approach.

Reference

Grossmann M, Ramchand S, Milat F, et al. Assessment and management of bone health in women with oestrogen receptor-positive breast cancer receiving endocrine therapy: Position statement of the Endocrine Society of Australia, the Australian and New Zealand Bone & Mineral Society, the Australasian Menopause Society and the Clinical Oncology Society of Australia. Clin Endocrinol (Oxf) 2018 May 9. Epub ahead of print

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