Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been interval improvement of a left pneumothorax . Small apical and lateral components remain with multiple small fluid components . Subcutaneous air in the left lateral soft tissues also decreased . Right lung is grossly clear with the exception of minimal linear atelectasis . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Decrease in size of small apicolateral left pneumothorax with multiple small hydropneumothorax components .