Our study suggests that <i>FOXP3</i> polymorphism rs3761548 is associated with BC susceptibility in the Chinese and may be involved in tumor progression.
Stratified data also revealed an association of homozygous mutant genotype with advanced stage of tumor in premenopausal women (OR = 4.56; 95% CI = 1.07-19.38; p = 0.04) with disease duration of <6 months (OR = .10; 95% CI = 1.80-20.50; p = 0.002) suggestive of modulating effect of rs3761548 in tumor progression.