Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are stable . Heterogeneous opacities in the lingula and left lower lung are worse compared to prior exam with silhouetting of the left hemidiaphragm and left heart border . Right lung is clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Progressive lingular and left lower lobe pneumonia .