FINDINGS:
A moderate to large right pleural effusion appears increased in size compared
 to the prior exam.  There is associated right basilar atelectasis.  Mild
 leftward shift of mediastinal structures appears relatively unchanged.  Heart
 size is likely normal.  There is no pulmonary vascular congestion.  Left lung
 is clear.  There are no acute osseous abnormalities.  A pigtail catheter is
 noted projecting over the right lung base.

IMPRESSION:
Interval increase in size of the moderate to large right pleural effusion with
 associated right basilar compressive atelectasis.