EGFR and non-small cell lung carcinoma: For example, Thakur et al. assessed EGFR mutations in exosomal DNA (exoDNA) from several NSCLC cell lines, including H292 (EGFR WT), H1975 (harboring the L858R and T790M mutations), H1650 and PC-9 (harboring the exon 19 deletion) [24].