Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior chest x-ray performed earlier on the same date , there is apparent worsening of the left lung base opacity , which is at least partially due to a small pleural effusion with adjacent atelectasis . However , given recent progression over the past several hours , aspiration should also be considered in the appropriate clinical setting . No other relevant changes . The endotracheal tube , left subclavian line and enteric tube are unchanged in position .
    OUTPUT:
    
Interval worsening left lung base opacity , which may be due to underlying pleural effusion with adjacent atelectasis , but superimposed aspiration should be considered in the appropriate clinical context .