In a transgenic K‐Ras+/LSLG12Vgeo;Trp53lox/lox;Elas‐tTA/tetO‐Cre (KPeC) mouse model, a subset of Saa3 (Serum amyloid A apolipoprotein family) null CAFs can suppress cancer growth [36]. This evidence concerns the gene KRAS and cancer.