Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs dated ___ , no significant changes appreciated . Hazy opacification at the lower left lung is likely a pericardial fat pad or scarring . No obvious pleural effusion . Lungs are otherwise fully expanded and clear without focal consolidation or suspicious pulmonary nodules . Heart size and cardiomediastinal silhouette are unchanged . Small , rounded opacity projecting over the anterolateral seventh rib appears unchanged since ___ and may represent a small bone island .
    OUTPUT:
    
Previously identified hazy opacification of the left lower lung is likely scarring or pericardial fat pad .