Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged , stable from prior examination . Mediastinal silhouette and hilar contours are otherwise unremarkable . There is mild pulmonary vascular prominence without interstitial edema . Lungs are otherwise clear . There is a trace blunting of the left costophrenic angle which may represent a trace pleural effusion . There is no pneumothorax . Median sternotomy wires are intact . The bones are diffusely osteopenic .
    OUTPUT:
    
Mild pulmonary vascular congestion without frank interstitial edema . Trace left - sided effusion .