...advanced NSCLC patients harboring EGFR mutations that have received TKI as first line therapy…EGFR uncommon mutations (de novo exon20 T790 mutations and exon18 G719X substitution)...odds ratio for poor response was more associated with uncommon mutations (OR = 8.21, IC95% = 1.94-97.18; p = 0.025)...According to our data, poor response is associated with uncommon EGFR mutations...