ERBB2 and breast cancer: The sensitivity values of the TACT assay by breast cancer subtype were 86%, 100%, 100%, and 83% for luminal A, luminal B, HER-2, and triple-negative breast cancer, respectively, and the sensitivity of the assay for these subtypes corresponded to that of the mammogram (96% for luminal A, 100% for luminal B, 100% for HER-2, and 83% for triple-negative breast cancer).