Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left central venous catheter is unchanged in an appropriate position . A tracheostomy is seen in place . The cardiomediastinal and hilar contours are within normal limits and unchanged . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion is seen . There is a small left apical pneumothorax not significantly changed in size . Pneumo there
    OUTPUT:
    
Small left apical pneumothorax not significantly changed .