Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a tiny left apical pneumothorax , unchanged from prior . Bilateral upper lobe opacities appear similar to prior . There is increased opacity in the left mid and lower lungs . Stable cardiomediastinal contours .
    OUTPUT:
    
Increasing left mid and lower lung opacity could reflect hemorrhage , aspiration infection , or asymmetrical edema . Unchanged small left apical pneumothorax .