Lung resection type was performed according to the results of frozen-section histological examination, of which 51 patients with benign nodules underwent wedge-resection, lobectomy and and lymph nodes harvasting (average number of N2 lymph nodes was 1.0 ± 0.8, N1 was 1.1 ± 0.3 per one patient) were performed in 84 non-small cell lung cancer patients.