Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube terminates 3 .2 cm from the carina . Enteric tube courses below the left hemidiaphragm with side port likely in the stomach and tip beyond the field of view . There is large left retrocardiac opacity with obscuration of the left hemidiaphragm likely reflecting some combination of pleural effusion , atelectasis and possible pneumonia . There is no large pneumothorax . The right lung is essentially clear . There is mild - to - moderate cardiomegaly . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . ET tube in appropriate position . 2 . Large left retrocardiac opacity may reflect pleural effusion , aspiration or atalectasis ; pneumonia is not excluded .