FINDINGS:
Re- demonstrated is severe thoracolumbar scoliosis.  Retrocardiac opacity may
 reflect a combination of a layering pleural effusion and atelectasis.  Minimal
 atelectasis at the right lung base.  No pneumothorax identified.  The
 appearance of the cardiomediastinal silhouette is unchanged.

IMPRESSION:
Retrocardiac opacity may reflect a combination of a layering pleural effusion
 and atelectasis.