TSLP and breast cancer: This study demonstrated that the T allele of the TSLP SNP rs3806933 showed a significant association with protected risk of BC in patients who were diagnosed with BC at an age below 48 years (OR = 0.368, CI = 0.172–0.785, p = 0.007) or above 48 years (OR = 0.350, CI = 0.145–0.846, p = 0.015) (Table 3A, 3).