Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . There is a new small left pleural effusion . Possible left basilar atelectasis or pneumonia . No pneumothorax . The cardiomediastinal hilar contours are stable .
    OUTPUT:
    
New small left pleural effusion and left basilar atelectasis but in the appropriate clinical setting pneumonia can be considered .