ESR1 and neoplasm: The patient was a 61-year-old woman with TNBC (27 mm estrogen receptor [ER] 5%, progesterone receptor [PR] 0%, HER2 IHC 0 tumor of ductal type, grade 3, Ki67 80%, PAM50 basal-like type, lymph node-negative and BRCA negative, clinical N0).