EGFR and non-small cell lung carcinoma: In terms of the mutant frequencies in the NSCLC specimens, EGFR exon 19 deletions were among the most mutated variants (43.5% vs. 50.9%), followed by L858R (36.3% vs. 29.3%), and exon 20 insertions (7.7% vs. 9.5%) in both FFPE and FNA groups, respectively.