Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left chest tube remains in unchanged position projecting over the mid medial lung . There has been interval increased patchy opacities in the left upper lung with persistent patchy opacities in the lower lung . The right lung remains clear . A right port is in unchanged position . No pneumothorax is present . The left pleural effusion is slightly improved . New subcutaneous emphysema along the left chest wall .
    OUTPUT:
    
1 . Unchanged appearance of left chest tube with mild improvement in left pleural effusion . 2 . Increased patchy opacities in the left upper lung with persistent patchy opacities in the left lower lung .