Agreed with the tumor growth inhibition, the tumor-infiltrated macrophages detected with CD11b staining were more enhanced in the irradiated CD47−/−/HER2−/− tumors compared to tumors with single-gene deletion (Fig. 5e), which was correspondingly associated with an increased necrosis detected in the CD47−/−/HER2−/− tumors compared to the CD47−/− or HER2−/− tumors (Supplementary Fig. 7). The gene discussed is ERBB2; the disease is neoplasm.