Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new left lower lung opacity which appears to involve the inferior lingular segment , which may represent pneumonia or atelectasis . There has been partial decrease in size of right subpulmonic effusion in comparison to prior exam . There is no left pleural effusion . The cardiomediastinal silhouette is unchanged . Additionally , there is a small area of sort tissue gas adjacent to the most lateral border of the right rib margins which is seen on multiple prior radiographs . This most likely represents a pocket of subcutaneous emphysema status post right thoracotomy , however , persistence on multiple examinations raises the possibility that this may represent focal lung herniation . This would be more likely in the presence of significant focal patient pain in the region . Otherwise , the lung parenchyma are grossly unchanged in appearance . There is stable biapical pleuroparenchymal scarring . There is no pneumothorax .
    OUTPUT:
    
1 . New inferior lingular segment opacity , ddx includes pneumonia and / or atelectasis . 2 . Decreased size of right subpulmonic effusion . 3 . Focal lucency adjacent to right chest wall , likely subcutaneous emphysema status post right thoracotomy , however , concern for focal lung herniation exists given stable appearance on multiple chest x-rays .