The study found that the MMP9 positive rate in TNBC tissues was 63.2%, compared to 32.5% in benign breast lesion tissues, suggesting that MMP9 plays a significant role in the development of TNBC and its high expression correlates with the tumor’s invasiveness and metastatic capabilities (Elbaz et al., 2015; Chien et al., 2018; Liu et al., 2020; Wang et al., 2019; Terkelsen et al., 2021). Here, MMP9 is linked to neoplasm.