Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A discrete , 4 .2 - cm opacity in the right lower lobe , seen most clearly on the lateral view , projecting over the inferior aspect of the right hilum , has at least doubled in size since ___ . There is also mild right upper lobe bronchial wall thickening , concerning for acute bronchitis . No pleural effusion or pneumothorax is detected .
    OUTPUT:
    
1 . Right lower lobe abscess , mass or infected bulla , growing over 18 months . Recommended a chest CT for further evaluation . 2 . Bronchial wall thickening in the right upper lobe , concerning for acute infection .