Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is minimally enlarged on this AP view . The cardiomediastinal and hilar contours are within normal limits . The right lung is clear . At the base of the left lung ( laterally on the AP view ) is an opacity , concerning for an area of infection . There is a small left effusion . Pneumothorax .
    OUTPUT:
    
Opacity within the left lung which may be in the lingula is concerning for an area of infection . Small left effusion .