Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post left upper lobe resection and radiation therapy . Stable postoperative and post-treatment changes in the left hemithorax , with marked volume loss manifested by leftward shift of the cardiomediastinal structures and elevation of left hemidiaphragm . Left - sided pleural opacification in the apical and basilar regions is again demonstrated . At the left base , this is associated with increased lateral blunting of the left costophrenic sulcus . Based upon the configuration of left hemidiaphragm contour and increased distance between apparent left hemidiaphragm contour and gastric bubble , there may be a subpulmonic component to this effusion . Right lung is slightly overexpanded but grossly clear , and there is no evidence of right pleural effusion . Left thoracotomy changes are again demonstrated .
    OUTPUT:
    
Increasing left pleural effusion , with likely subpulmonic component . A left lateral decubitus radiograph could be considered to better quantify the amount of pleural fluid if warranted clinically .