Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided central line appears unchanged position in this patient status post sternotomy . The right - sided pleural effusion is decreased a little in size . A drain remains in position . There is increased opacity in the left base consistent with an enlarging knee effusion . There is a right upper lobe opacity which is unchanged . The left mid zone opacity is also seen .
    OUTPUT:
    
Increasing left - sided effusion . Overall no other significant change .