Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A trace left apical pneumothorax , which was likely present on the post chest tube radiograph from yesterday , is unchanged . The left chest tube is unchanged in position . The lungs are clear . The hilar and cardiomediastinal contours are normal . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
Trace left apical pneumothorax is likely unchanged from the post chest tube radiograph from yesterday .