FINDINGS:
Left apical lateral pneumothorax measuring up to 3.4 cm in largest dimension. 
 No appreciable right pneumothorax is noted.  Atelectasis of the left lung base
 with elevation of the left hemidiaphragm.  Re-expansion of the left upper lobe
  chest radiograph.  Bronchial valves project over the left mid
 lung.  The heart is normal in size.  Mediastinum is not widened.  No evidence
 of tension.

IMPRESSION:
1.  Moderate left pneumothorax without evidence of tension.
 2.  Left bronchial valves - if assessment of location is desired, CT is
 needed.