For that the allele associated with an increased risk of erythema was defined as risk allele, which was: A-allele for ATM and XRCC1, T-allele for TGFB1 and XPD and G-allele for GSTP1. However, no significant association with risk of erythema, either for all patients (OR = 1.20; 95% CI: 0.90-1.62; p = 0.209), patients with small breast volume (OR = 1.36; CI: 0.94-2.04; p = 0.098) or for patients with a large volume (OR = 0.89; CI: 0.52-1.50; p = 0.712) was detected for this risk profile. This evidence concerns the gene GSTP1 and Erythema.