Table 3.

Characteristics of lung lesions n (%)

Characteristic	Lung metastasis (n = 30)	Benign (n = 10)	P value
Type of lung operation
VATS	25 (83.3)	9 (90.0)	0.526
Open	5 (16.6)	1 (10.0)
Lung operation-related complications	0	0
Number of lung nodules
1	18 (60.0)	6 (60.0)	0.547
2	10 (33.3)	2 (20.0)
3	2 (6.6)	2 (20.0)
Size of lung nodules (mm)	11.8 ± 7.5	11.8 ± 7.0	0.881
Bilaterality
Unilateral	27 (90.0)	10 (100)	0.411
Bilateral	3 (10.0)	0
Pre-thoracotomy serum CEA elevation	0	0
Pre-thoracotomy serum CA19-9 elevation	0	0

CA19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; VATS: Video-assisted thoracoscopic surgery.