Expert Perspectives in mBC
Abbreviations: 1L, 1st Line; 2L, 2nd Line; CDK4/6i, cyclin-dependent kinase 4/6 inhibitor;
ESR1, estrogen receptor 1; ESR1m, estrogen receptor 1 mutation; ET, endocrine therapy; mBC,
metastatic breast cancer.
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Expert Perspectives in mBC
How do ESR1 mutations impact 2L treatment decisions?
Abbreviations: 1L, 1st Line; 2L, 2nd Line; CDK4/6i, cyclin-dependent kinase 4/6 inhibitor;
ESR1, estrogen receptor 1; ESR1m, estrogen receptor 1 mutation; ET, endocrine therapy; mBC,
metastatic breast cancer.