Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval median sternotomy and CABG . There is pulmonary edema and small bilateral pleural effusions . Superimposed infection however ca n't be excluded . No pneumothorax identified . The size of the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Pulmonary edema and small bilateral pleural effusions . A superimposed infection can not be excluded in the proper clinical context .