Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild interval increase of pleural space in the anterior hemithorax previously occupied by the right upper lobe with mild increase in fluid of unclear etiology . Minimal decrease in subcutaneous emphysema . Right lung is clear without pneumothorax or pleural effusion . Heart size is obscured ; however , right mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
1 . Mild interval increase in pleural space of right anterior hemithorax with mild fluid increase of unclear etiology . 2 . Minimal decrease in subcutaneous emphysema .