As expected, Ki67 staining suggested that Kras+/LSLG12Vgeo and BrafCA/+; Lkb1flox/+-induced adenocarcinomas had increased cell proliferation rates (p<0.0052 for BrafCA/+;Lkb1flox/+ vs. BrafCA/+) (Figure 4 and Figure S1A). This evidence concerns the gene KRAS and adenocarcinoma.