When examining the postsurgical concentration of the tested parameters, the statistical analysis showed that after surgical treatment BC-total patients’ group, Luminal B subgroup and fibroadenoma group of patients had significantly lower concentrations of MMP-3 (4.32 ng/mL, p = 0.006; 3.76 ng/mL, p = 0.005; 4.42 ng/mL, p = 0.037, respectively) (Table 3) compared to healthy women group (6.53 ng/mL). This evidence concerns the gene MMP3 and breast cancer.