Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple structures overlie the chest . Given this , the cardiac silhouette is mildly enlarged . Mediastinal contours are unremarkable . No large pleural effusion is seen . No focal consolidation or pneumothorax is seen .
    OUTPUT:
    
Enlarged cardiac silhouette . No definite pleural effusion on this single frontal radiograph .