Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There may be a very trace left pleural effusion . Prominence of the central pulmonary vasculature suggests mild pulmonary vascular congestion . The cardiomediastinal silhouette is moderately enlarged . No pneumothorax is seen .
    OUTPUT:
    
Enlarged cardiomediastinal silhouette . Mild pulmonary vascular congestion . Subtle right base opacity most likely relates to vascular congestion although underlying infection is difficult to exclude .