Table 3. Characteristics of 3 cases with discrepancy in PT & LN in major mutations.

Patient #	EGFR mutation in PT	EGFR mutation in LN	Tumor % in PT	Tumor % in LN	Tissue acquisition method for PT	# of aspirations by EBUS-TBNA for LN specimen
12	Deletion 19	WT	> 50%	5%	TTNB	2
13	Deletion 19	WT	> 50%	10%	surgery	2
25	L858R	WT	20	10%	TTNB	3

PT; primary tumor, LN; lymph node, WT; wild type TTNB; transthoracic needle biopsy