Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The mid to lower left lung is opacified suggesting a large pleural effusion and extensive atelectasis , including likely left lower lobe collapse secondary to compressive atelectasis . There is a small right pleural effusion . There is no pneumothorax . There is a mild interstitial abnormality . The cardiac silhouette has enlarged considerably from ___ .
    OUTPUT:
    
Large left - sided pleural effusion and extensive atelectasis involving the lingula and left lower lobe . Findings suggesting mild vascular congestion .