Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate left pleural effusion with overlying atelectasis . Left base consolidation is difficult to exclude . No pneumothorax is seen . The cardiac and mediastinal silhouettes are stable , with the cardiac silhouette persistently enlarged . Dual lead left - sided pacer device is stable in position . .
    OUTPUT:
    
Left pleural effusion with overlying atelectasis , underlying consolidation not excluded .