In BRCA, the level of LCN2 expression negatively correlated with tumor purity (r = −0.219, P = 3.17e-12), and positively correlated with B cells (r = 0.074, P = 2.08e-02), neutrophils (r = −0.127, P = 8.14e-05), and dendritic cells (r = 0.134, P = 3.27e-05). Here, LCN2 is linked to neoplasm.