Purpose The landscape of HER2+ metastatic breast cancer (mBC) treatment is changing due to the availability of new anti- HER2 drugs. The purpose of this study was to assess the current treatment patterns and sequences used in HER2+ mBC in the real-world setting. Secondary objectives were to describe the factors that influence the decision to prescribe a first and second-line antitumour treatment. Methods Retrospective chart review of 3068 cases in Spain, Italy, the Netherlands and the UK. Results First and second-line treatments and regimens are consistent with the clinical guidelines, especially for recently initiated treatments. Age and performance status (PS) of patients impact treatment patterns: younger patients received more innovative treatments than elderly patients. In addition, while most patients received a first antitumor treatment, the rate of patients who continue to subsequent lines of therapy is low (55% transitioning from 1st to 2nd line; 58% from 2nd to 3rd line). Age and PS are key factors in the decision to prescribe further antitumor treatment. Conclusion Fewer HER2+ mBC patients than expected receive a second and third line therapy. Guidelines should make specific recommendations for older patients or those with a poor PS. Keywords HER2+ metastatic breast cancer · Treatment patterns ·
Breast Cancer Research and Treatment – Springer Journals
Published: Nov 23, 2017
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