Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy left base opacity may be due to atelectasis although consolidation is not excluded in the appropriate clinical setting . Previously seen bilateral pleural effusions have essentially resolved in the interval . No pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Patchy left base opacity could be due to atelectasis although consolidation due to pneumonia or aspiration is not excluded , nor is residua from prior lung findings . Recommend followup to resolution .