The prognostic value of the MMP3 was also tested by Kaplan–Meier analysis of OS using the SCAN-B cohort of 3273 breast cancer patients [26] and validated using the METABRIC cohort of 1904 breast cancer patients [29] or TCGA-BRCA cohort of 1091 patients [24]. This evidence concerns the gene MMP3 and breast carcinoma.