EGFR and non-small cell lung carcinoma: Of 12,148 patients who underwent EGFR testing, 17.1% (n = 2,080) had a confirmed diagnosis of EGFR Mut+ NSCLC, with exon 19 deletion (41.5%, n = 864) or exon 21 L858R point mutation (31.0%, n = 645) identified most frequently (Fig 2).