Results: 43/64 (67.2%) patients with EGFR mutations, including 1 case with G719S mutations exon 18 (2.3%), 25 deletions in exon 19 (58.1%), 8 cases with T790M mutation in exon 20 (18.6%), 13 cases with L858R mutation (30.2%) and 1 with L861Q mutation (2.3%) in exon 21.