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INTRODUCTIONAbout three‐fourths of breast cancers express the oestrogen receptor (ER) and are dependent on the molecular function of ER as a transcription factor for their survival and proliferation. The backbone of adjuvant therapy for localised ER‐positive breast cancers consists of hormonal therapies with an oral hormonal agent (either an aromatase inhibitor or tamoxifen). These therapies when taken for 5 years post‐operatively result in significant survival benefits for ER‐positive cancer patients by reducing the risk of disease recurrence and prolong survival (ATAC Trialists' Group, 2005; Breast International Group (BIG) 1‐98 Collaborative Group et al., 2005; Swain, 2005). For post‐menopausal patients, oral hormonal treatments are currently used as mono‐therapies, while, for pre‐menopausal women, they may be combined with ovarian suppression therapy (Francis et al., 2015, 2018). Prolonged hormonal therapy of 10‐year duration is recommended for high‐risk patients (Goss et al., 2016). However, hormonal therapies are associated with a wide range of adverse effects that interfere with long‐term adherence to treatment and may even compromise benefit, if therapies are discontinued prematurely. The most common adverse effects of hormonal therapies are their menopause‐type symptoms that include hot flushes, night sweats and musculoskeletal stiffness or pains (Winer et al., 2005). A general feeling of unwellness is quite bothersome for some women
European Journal of Cancer Care – Wiley
Published: Nov 1, 2022
Keywords: adherence; aromatase inhibitors; compliance; predictive factors; tamoxifen
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