For instance, one recent report using PEA profiling of the extracellular compartment showed similar profiles in BC and mammographically dense healthy breast tissues compared to nondense healthy breast tissue; for instance, CCL4, CCL7, CCL8, CCL23, CXCL5, CXCL8, CXCL9, and VEGF showed elevated levels (Abrahamsson et al., 2018). This evidence concerns the gene CXCL9 and breast cancer.