Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hypoinflated with crowding of vasculature and new heterogeneous granular right lower lobe opacity . Persistent left perihilar opacity is unchanged since ___ consistent with known left lung cancer . Biapical scarring again noted . Heart size , mediastinal contour , and hila are otherwise unremarkable . No pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Stable left perihilar opacity consistent with known left lung cancer , unchanged since ___ . 2 . Heterogeneous right lower lobe opacity may represent atelectasis , aspiration , pulmonary hemorrhage , or pneumonia .