We further explored the NETs after lung tumorigenesis and found that NETs in lung metastases overexpressed with HRG decreased, while NETs in lung metastases with HRG knockdown and KO‐HRG mice increased (Figure 5E), while Ki67+ cancer cells were positively correlated with NETs (Figures 5f and S7f and g). The gene discussed is MKI67; the disease is cancer.