Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs : There are hazy opacities in the left retrocardiac region and left lower lobe silhouetting with the left hemidiaphragm , new compared to the prior radiograph . Unchanged linear opacities in the right upper lobe and prominence of right lower lobe vessels . Pleura : Likely small left pleural effusion . Mediastinum : Stable mild cardiomegaly . Mediastinal silhouette is within normal limits . Bony thorax : No change in bony thorax Lines and tubes : A thin metallic , likely epidural catheter projects over the right hemi thorax , new from before .
    OUTPUT:
    
New left retrocardiac and lower lobe opacities with a small left pleural effusion likely represent pneumonia in the right clinical setting . Unchanged scarring in the right upper apex . Stable cardiomegaly .