Compared with Foundation Medicine (FM) data representing the largest EGFRex20ins cohort, we found that although EGFR mutations were much more common in our Chinese NSCLC patients than that of Western population (47.3% vs 15.5% in FM), EGFRex20ins mutation represented a much smaller group in EGFR mutant NSCLC (4.8% vs 11.7% in FM, p < 0.001) [17]. Here, EGFR is linked to non-small cell lung carcinoma.