Gallen consensus meeting of breast cancer: luminal A-like type (ER-positiveand/or PgR-positive, HER2-negative, low proliferation, and low tumor burden), luminal B-like type (ER-positiveand/or PgR-positive, HER2-negative, high proliferation, and high tumor burden), hormone receptor-positive and HER2-positive type, hormone receptor-negative and HER2-postive type, and triple-negative (TN) type (hormone receptor-negative and HER2-negative) [4, 5]. Here, ESR1 is linked to breast cancer.