However, one of them was missed probably because, following the scraping of the FFPE block for IdyllaTM to analyze, only 5% of the tumor cells remained in the sample (the sensitivity threshold of the IdyllaTM technique is 10% of tumor cells), and the deletion of the exon 19 of the EGFR reported by NGS had a low allelic frequency of 2.80%. Here, EGFR is linked to neoplasm.