Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac and mediastinal silhouettes are grossly stable with the cardiac silhouette mildly enlarged . Patient is status post median sternotomy . There is blunting of the bilateral posterior costophrenic angles , suggesting trace pleural effusions . No focal consolidation is seen . There is no pulmonary edema or pneumothorax .
    OUTPUT:
    
Trace pleural effusions . Persistent cardiomegaly . No pulmonary edema .