Table 1. The clinical and pathological characteristics of patients.

Variables	Number of patients (n)	Proportion	Ranges
Gender     Female     Male	9 91	9% 91%	- -
Mean age (years)	-	-	59.7±10.5 (range, 37-78)
Non-smoker® Smoker	9 90	9% 90%	- -
Operation type     Pneumonectomy     Lobectomy	18 (14 left/4 right) 82	- -	- -
Histopathology     Squamous cell carcinoma     Adenocarcinoma	50 50	- -	- -
Mean tumor diameter (cm)			4.9±2.1 (1-12)
Tumor stage     1A     1B     2A     2B     3A	5 28 21 21 25	5% 28% 21% 21% 21% (N2 involvement in 22 patients)	- - - - -
Differentiation     Well     Moderate     Poor	57 31 12	57% 31% 12	- - -
Adjuvant therapy     Chemotherapy*     Radiotherapy     Chemotherapy + Radiotherapy	29 15 6	- - -	- - -

*Cisplatin-based chemotherapy regimens.