Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is little change in the blunting of the left costophrenic angle likely due to a small pleural effusion , pleural scarring , or a combination of the two . There is no right pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No significant change in the blunting of the left costophrenic angle , possibly due to a small pleural effusion , pleural scarring , or combination of the two .