Table 2.

Characteristic of EGFR gene mutation types in 464 NSCLC patients

EGFR mutation type	Positive number	Proportion (%)
18 exon (G719X)	6	2.87
19 exon (-del)	84	40.19
20 exon (T790M)	15	7.18
20 exon (S768I)	2	0.96
21 exon (L858R)	97	46.41
21 exon (L861Q)	5	2.39
Total	209	100.00