KRAS and mucinous cystadenoma: Interestingly, and regardless of the presence of Lkb1, we never observed the development of mixed solid and mucinous adenomas and adenocarcinomas in Tyr::CreERT2; BrafCA/+ mice as it occurs in CMV-CreT/+; K-ras+/LSLG12Vgeo mice (Figure 3N–3P).