Bioinformatic analysis confirmed a statistically significant difference in the level of expression of BIRC3 gene in patients with BC from the pN0 and pN1, pN0 and pN3 groups, BIRC4 gene in patients from pN0 and pN1, pN0 and pN2, pN2 and pN3, BIRC5 gene in patients from pN0 and pN3 (Table S4, Figure S4). The gene discussed is XIAP; the disease is breast cancer.