The 17 DEGs identified were associated with the immune response in breast cancer patients, including B cell activation (IGKC, IGHM, IGLL5, IGLC1), cell chemotaxis (CXCL11, CXCL10, CXCL13), phagocytosis (IGKV1-17, IGKC, IGLC1). Here, IGLL5 is linked to breast cancer.