Performing allele-specific polymerase chain reaction (AS-PCR) on primary melanoma cell lines and NSCLC cell lines to characterize mutational status in BRAF and EGFR, respectively in exosomal DNA, their findings portrayed that exosomal DNA could be used to classify the mutational status of these two genes in parental cell lines [87]. Here, EGFR is linked to non-small cell lung carcinoma.