Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained demonstrates midline sternotomy wires . There is increasing left pleural effusion . Evaluation limited due to exclusion of the left lower lateral chest . There is small right pleural effusion . There may be mild pulmonary interstitial edema . The heart size can not be assessed . The aorta is unfolded . No pneumothorax .
    OUTPUT:
    
Increasing left effusion with possible mild pulmonary edema .