Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An apically directed left chest tube is present . There is a new retrocardiac opacity likely reflective of atelectasis and pleural fluid . No focal consolidation in the right lung . No pneumothorax identified . The size of the cardiomediastinal silhouette is enlarged .
    OUTPUT:
    
New retrocardiac opacity likely reflecting combination of pleural fluid and atelectasis . Mild interval increase in size of the cardiomediastinal silhouette , presumed to be postsurgical . Attention on follow - up imaging is recommended .