Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There has been interval development of a left pneumothorax , moderate in overall size with associated collapse of portions of the left lower lobe . There is mild rightward shift of midline structures which could indicate a component of tension . Patient is known to have extensive bronchiectasis and scarring with large cavities in the upper lobe . The low right lung is grossly clear . No acute bony abnormalities . Clips in the upper abdomen noted .
    OUTPUT:
    
Moderate left pneumothorax with early signs of tension . Decompression advised .