Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are well expanded and clear without focal consolidation or pneumothorax . Blunting of the left costophrenic sulcus likely represents pleural scarring , but in the absence of prior imaging , a new tiny effusion can not be excluded . There is no right effusion . Heart size is normal . Mediastinal silhouette and hilar contours are normal . No osseous abnormality is identified . No free air under the diaphragm .
    OUTPUT:
    
Blunting of the left costophrenic sulcus is likely scarring , but new tiny effusion can not be excluded , particularly without the benefit of comparison to prior imaging .