ERBB2 and triple-negative breast carcinoma: Moreover, compared with the sensitivity values of conventional assays for the blood markers CEA (8% for luminal A, 14% for luminal B, 11% for HER-2, and 0% for triple-negative breast cancer) and CA 15-3 (12% for luminal A, 0% for luminal B, 11% for HER-2, and 0% for triple-negative breast cancer), this showed that the sensitivity of the TACT assay was remarkably high (Figure 3f).