In addition, in the group with fibroadenomas, the lowest level compared to HER2(+)/(−) and control groups was shown for such cytokines as IL-6 (2.78 pg/mL), IL-8 (55.73 pg/mL), and IL-18 (62.5 pg/mL). This evidence concerns the gene ERBB2 and Fibroadenoma.