We profiled 641 miRNAs in laser-assisted microdissected samples from normal Tamoxifen non-induced (N), or Tamoxifen induced non-neoplastic (4-OHT+ N) lung parenchyma and neoplastic tissues (Hyperplasia, Hyp, Adenoma, Ad and Adenocarcinoma, AdCa) isolated from K-Ras(+/LSLG12Vgeo);RERTn(ert/ert) mice, a well-established model of lung cancer tumorigenesis (Figure 1A; [3]). The gene discussed is KRAS; the disease is adenoma.