KRAS and lung adenocarcinoma: Mutations of the v-Ki-ras2 Kirsten rat sarcoma viral oncogene homology gene (KRAS) gene are the most common oncogenic drivers of non-squamous non-small cell lung carcinoma (NSCLC) and occur in approximately 25–38% of non-Asian and 8–10% of Asian lung adenocarcinoma patients [1,2,3].