Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval development of a moderate left apical pneumothorax . The left pleural effusion is significantly decreased compared to prior radiograph . The remainder of the exam , including a widened peritracheal stripe and postsurgical changes of the right apex , are unchanged .
    OUTPUT:
    
1 . Interval development of a moderate left apical pneumothorax . 2 . The left pleural effusion is significantly decreased .