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. 2018 May 16;20:40. doi: 10.1186/s13058-018-0968-0

Fig. 2.

Fig. 2

Circulating ESR1 mutation frequency during HR+ breast cancer history. At the end of adjuvant treatment by AI, circulating ESR1 mutations were not detected among the 42 patients of this cohort. At relapse, 2/38 patients (5.3%) had a detectable circulating ESR1 mutation. At progression after re-exposure to AI as first-line metastatic treatment, 7/21 patients (33%) had a detectable circulating ESR1 mutation. AI aromatase inhibitor, CT chemotherapy, RT radiation therapy