Table 5. Characteristics of individual patients with unforeseen pN2 following anatomical resection.

Surgical modality	Tumor location	Indication for VAM(LA)	cTNM stage after imaging	Tumor histology	2L	2R	4L	4R	7	Positive node(s)
VAMLA	LLL	Central tumor	Ib	Adeno	Yes	Yes	Yes	Yes	Yes	6 and 7
	LUL	Central tumor	Ib	Adeno	Yes	Yes	Yes	Yes	Yes	5
	LUL	Central tumor	IIb	Adeno	Yes	Yes	Yes	Yes	Yes	5
	LUL	Suspicious nodes	Ia	Squamous	Yes	Yes	Yes	Yes	Yes	6
	LUL	Central tumor	IIb	Squamous	Yes	Yes	Yes	Yes	Yes	5
	LUL	Central tumor	Ia	Squamous	No	Yes	Yes	Yes	Yes	6
	LUL	Central tumor	IIb	Squamous	Yes	Yes	Yes	Yes	Yes	9
	RLL	Tumor >3 cm	IIa	Squamous	No	Yes	Yes	Yes	Yes	7
VAM	LUL	Suspicious nodes	IIb	Adeno	No	No	No	Yes	Yes	5
	RUL	Central tumor	Ib	Squamous	No	Yes	No	Yes	Yes	4R
	RUL	Central tumor	IIIa	Squamous	No	Yes	Yes	Yes	Yes	7
	RLL	Central tumor	Ib	Squamous	No	Yes	Yes	Yes	Yes	7
	RLL	Suspicious nodes	Ib	Squamous	No	No	Yes	Yes	Yes	7
	LUL	Suspicious nodes	IIb	Squamous	Yes	Yes	Yes	Yes	Yes	5
	LUL	Tumor >3 cm	IIb	Large cell	No	Yes	Yes	Yes	Yes	5
	LUL	Central tumor	IIa	Large cell	No	No	Yes	Yes	Yes	5
	LLL	Suspicious nodes	IIb	Large cell	No	No	Yes	Yes	Yes	7

VAM, video-assisted mediastinoscopy; VAMLA, video-assisted mediastinoscopic lymphadenectomy; cTNM, clinical TNM; LUL, left upper lobe; LLL, left lower lobe; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe.