Although no SNP was associated with breast cancer risk among women of European descent, we found evidence for an association among East Asians for rs1800925 (IL-13) and breast cancer risk (OR = 2.08; 95% CI: 1.32–3.28; p = 0.000779), which remained statistically significant after multiple testing correction (padj= 0.0350). This evidence concerns the gene IL13 and breast cancer.