Fig. 1

a, c and e Chest X-ray taken before the procedure (November, 2017) and computed tomography (CT) scan taken in May, 2017 (transverse and sagittal views, respectively) indicated severe emphysema and a huge bullae in the right middle lobe compressing the right lower lobe parenchyma. b, d and f A Chest X-ray taken 1 week after the procedure (November, 2017) and a CT scan taken 2 months after the procedure (January, 2018, transverse and sagittal views, respectively) showed that the huge bullae in the right middle lobe had disappeared. This caused the volume of the right middle lobe to decrease but that of the compressed right lower lobe to re-expand