KRAS and lung adenocarcinoma: According to the cBio Cancer Genomics Portal (cBioPortal), a pan-cancer study of The Cancer Genome Atlas (TCGA) on different types of cancer observed the highest percentages of KRAS mutation in pancreatic adenocarcinoma (PAAD) followed by colorectal adenocarcinoma (CRAD), lung adenocarcinoma (LUAD), and uterine corpus endometrial carcinoma (UCEC) (Figure 1B).