KRT7 and breast cancer: The number of EpCAM-CK7/8− CCs in breast cancer M0 patients did not differ from those in patients of M0mts and M1 groups, totaling 3174.00 (1707.00–6540.00), 7810.00 (2923.00–18,707.00), and 2513.00 (1023.00–62,666.00) cells/mL, respectively (Fig. 5A) (p > 0.05).