Figure 1.
Distribution of all primary EGFR mutations identified in the current study. Although, based on our analysis, insertions in exon 20 corresponded to 9% of all EGFR mutated samples, we estimate that the true incidence may be even higher, closer to 11%, factoring in the expected positive cases which would have been detected if the entire negative group had been tested. Figure includes 5 cases with double mutations as follows *2 cases with double mutations G719A/S768I and G719S/E709A, **2 cases with concurrent T790M at baseline, *** 1 case with concurrent T790M at baseline.