In Bangladesh, various studies have explored the associations between breast cancer and different gene polymorphisms, including rs13181 of ERCC2, rs2276466 of ERCC4, rs80357713 and rs80357906 of BRCA1, rs11571653 of BRCA2, rs1136201 of HER2, rs1042522 of TP53, rs16260 of CDH1, rs25487 of XRCC1, rs861539 of XRCC3, as well as rs1219648, rs2420946, and rs2981582 of the FGFR2 gene [78–82]. Here, ERBB2 is linked to breast cancer.