Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the left - sided PICC . Subtle patchy left mid to lower lung opacities are seen , best seen on the frontal view , new since the prior study , concerning for infection , less likely atelectasis . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Patchy left mid to lower lung opacities raise concern for pneumonia .