Irrespective of the molecular subtype of BC, analyses of microarray data also revealed, a strong positive correlation between the expression of CXCL1mRNA in BC samples, and that of angiogenic ELR+ chemokines, such as CXCL3 (ρ = 0.756), CXCL2 (ρ = 0.732), CXCL6 (ρ = 0.728), CXCL5 (ρ = 0.676), and tumor progression genes, specifically, FGFBP1 (ρ = 0.678), BCL11A (ρ = 0.654), PI3 (ρ = 0.629), B3GNT5 (ρ = 0.609), BBOX1 (ρ = 0.609), and PTX3 (ρ = 0.603). This evidence concerns the gene CXCL6 and breast cancer.