Fig. 2

Chest computed tomography (CT) images and intraoperative findings of case 2. a Chest CT revealed a low-density area in right S2, as indicated by red arrows. b In the left image of the reconstructed chest CT, red structures represent pulmonary arteries, and green structures represent bronchi. The yellow ellipse represents the lesion. In the right image, red, green, and blue regions indicate the right upper, middle, and lower lobes, respectively. The green structures represent the bronchi. The yellow area is the low-density area. These findings demonstrated the absence of B2 and A2. c Emphysematous changes in S2 are indicated by a red arrow. d Intraoperative findings after resection of the lesion. V2a is indicated by the right white arrow, and V2c is indicated the left white arrow