Fig. 1

Pulmonary mass. a: Left lung atelectasis was established by chest X-ray test. b: Chest X-ray showed a re-expansion of the left lung and a mass in the left upper lobe after interventional therapy. c: Bronchoscopy showed a tumor that completely obstructed the left main bronchus. d: The interventional therapy fully re-opened the obstructed left main bronchus and the lower subsegment of the left lower lobe. e: The lesion was partially resected by loop electrocautery via flexible bronchoscopy. f: Chest CT scan showed a tumor on the left upper lobe. g: Coronal CT after loop endoscopically resection on the left upper lobe. h: Chest CT scan showed the residual scar tissue after surgery a week later. i: CT demonstrated no relapse after a 6-year follow-up in 2019.12