Table 1.

Relationship between local invasion and gene mutation status

Metastasis	Mutated N = 64			Wild-type N = 39	P value (mutated vs. wild-type)
	Exon 18 N = 2	exon 19 N = 36	exon 21 N = 26
Pleural invasion	1	22	20	17	p = 0.018
Lymph node metastasis	0	12	10	10	p > 0.05
Endobronchial metastasis	1	16	8	7	p = 0.005