Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . Left pleural effusion is small if present . The is no right pleural effusion . There is no pneumothorax . Lung volumes are low without new focal consolidation . A bulbous opacity at the left base is less conspicuous than on the prior study but persists , new since ___ . The ET tube terminates 5 .5 cm above the carina , above the superior margin of the clavicular heads , with the neck extended . The NG tube , right internal jugular line , and left PICC line are in stable positions .
    OUTPUT:
    
1 . ETT is too high and should be advanced by several cm for more optimal positioning . 2 . Persistent bulbous opacity at the left lung base , which may represent a mass or abscess .