Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well inflated . Mild bilateral apical scarring noted . Subtle peribronchial opacity only seen on frontal view in the left lung superior and lateral to the left hilus is unchanged since prior examination . The lungs are otherwise clear . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Visualized osseous structures are notable for anterior cervical spine fusion device . Mediastinal clips are again seen within the left upper quadrant .
    OUTPUT:
    
Persistent subtle peribronchial opacity in left lung is worrisome for early pneumonia in the appropriate clinical setting .