CXCL8 and breast cancer: In light of data indicating the crucial importance of IL-6 and IL-8 in carcinogenesis, our study aimed to determine the role of IL-6 and IL-8 genes in the molecular mechanism of BC development by evaluating the potential association between three polymorphisms located in genes encoding interleukin (-597 A>G (rs1800797) and c.3331 G>A (rs2069845) in IL-6, c.+396 T>G (rs2227307) in IL-8) and the development of BC in a Polish population.