Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Compared to the most recent study , the left pneumothorax has decreased . The left - sided pigtail catheter is in appropriate position . Minimal subcutaneous emphysema . Mediastinal shift has decreased . The left pleural effusion is unchanged . Left clavicular fracture is unchanged . There are no opacities concerning for pneumonia . The cardiac , mediastinal , and hilar contours are normal .
    OUTPUT:
    
Decreased left pneumothorax , subcutaneous emphysema and mediastinal shift .