Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pectoral transvenous defibrillator is in unchanged position with tips terminating in right atrium and right ventricle . Left lower lobe pleural effusion has increased slightly . No consolidation . No pneumothorax . The cardiac silhouette is top normal but unchanged . The mediastinum is normal .
    OUTPUT:
    
The left pleural effusion has increased slightly .