Department of Thoracic Surgery Peking University People’s Hospital Beijing 100044 China;
Department of Thoracic Surgery Peking University People’s Hospital Beijing 100044 China;
Department of Pathology Peking University People’s Hospital Beijing 100044 China;
Department of Thoracic Surgery Peking University People’s Hospital Beijing 100044 China;
Thin-walled lung cancer; Observation; The check-valve mechanism; Case report;