Table 1 Total entry cases of general thoracic surgery during 2012

	Cases	%
Benign pulmonary tumor	863	1.2
Primary lung cancer	35,667	48.9
Other primary malignant pulmonary tumor	348	0.5
Metastatic pulmonary tumor	7,403	10.2
Tracheal tumor	73	0.1
Mesothelioma	409	0.6
Chest wall tumor	752	1.0
Mediastinal tumor	4,671	6.4
Thymectomy for MG without thymoma	302	0.4
Inflammatory pulmonary disease	3,405	4.7
Empyema	2,250	3.1
Bullous disease excluding pneumothorax	569	0.8
Pneumothorax	14,410	19.8
Chest wall deformity	415	0.6
Diaphragmatic hernia including traumatic	112	0.2
Chest trauma excluding diaphragmatic hernia	393	0.5
Lung transplantation	44	0.1
Others	813	1.1
Total	72,899	100.0