Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hila are normal . There is no pleural effusion and no pneumothorax . There is minimal blunting of the left costophrenic angle , likely due to fibrotic changes of the pleura . There is a scar - like opacity at the right middle lobe , similar to ___ .
    OUTPUT:
    
Scar - like opacity at the right middle lobe , unchanged since ___ .