KRAS and lung cancer: In Caucasian patients the mutation frequency is 14% for EGFR and 33% for KRAS.16 However, in a cohort of 306 lung cancer patients of Chinese ethnicity, the most frequently mutated gene was EGFR (46.7% of patients) and KRAS had a mutation frequency of only 10.1%.25 This Asian patient‐specific mutation pattern was confirmed by other studies that investigated 33548 and 11249 Chinese lung cancer patients, in which EGFR and KRAS were mutated in 39% (335 patient study), 51.79% (112 Patient study), and 11% (335 patient study), 8.93% (112 patient study), respectively.