Figure 2From: Do bullae and emphysema increase risk of pneumothorax in silicosis?CT. 1: Hydropneumothorax in right lung. 2: Multiple bullae in both lungs. 3: Paraseptal emphysema in left lung. 4: Mixed alveolar and interstitial pattern as silicoproteinosis and fibrosis. 5: Air bronchogramBack to article page