Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are hyperinflated . Although on the frontal view the right lung base is unchanged , on the lateral there is slightly increased opacity in the retrocardiac region . Blunting of the costophrenic angles suggests small pleural effusions . Cardiomediastinal silhouette is unchanged . Superior retraction of the left hilum with surgical chain sutures in the suprahilar region are again seen . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Better seen on the lateral view is slightly increased opacity in the retrocardiac region , potentially could be infectious , and followup will be necessary given patient 's history .