The expression of 9 upregulated genes (TACR1, IRF7, BST2, IFITM1, LAMP3, SELL, CXCL9, IL12B, IL12B, GPR132, IL18) and 2 downregulated genes (KCNMB2, TACR1) in breast cancer were visualized using a heatmap (Fig. 1B). Here, IL18 is linked to breast cancer.