The evaluation of the plasma levels of MMP-3, MMP-7 and the CA 15-3 marker in breast cancer patients compared to patients with benign lesions and compared to a control group of healthy women before and after surgery are shown in Table 2 and Table 3 and Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6. Here, MMP3 is linked to breast cancer.