However, current evidence suggests that EGFR Exon 20ins tend to be mutually exclusive with other common NSCLC mutation types including other EGFR mutations and mutations in KRAS, BRAF, HER2, NRAS, PIK3CA, MAP2K1/MEK1, AKT, as well as ALK rearrangements [4, 57, 58]. This evidence concerns the gene NRAS and non-small cell lung carcinoma.