In addition, tissue levels of IL-17A were remarkably higher in BC patients (694.5 ± 76.67 pg/mL) than in normal tissues (172.3 ± 48.28 pg/mL) with a 522.2 ± 13.85 pg/mL difference between the normal and tumoral tissues (p < 0.0001) (Fig. 2B). Here, IL17A is linked to breast cancer.