The suppressed LAC phenotype in KrasG12D:Adam17ex/ex mice was associated with a significant reduction in the proliferative index of tumor‐bearing KrasG12D:Adam17ex/ex lungs, as measured by cellular reactivity to proliferating cell nuclear antigen (PCNA), compared to KrasG12D lungs (Figs 2A and B, and EV1D, Appendix Fig S1E and F). The gene discussed is PCNA; the disease is neoplasm.