FINDINGS:
Worsening opacification involving the right lower lobe and right middle lobe
 with associated volume loss, concerning for a postobstructive process in the
 setting of a prominent and rounded right hilar contour. Small to moderate
 right pleural effusion has also increased in size. Cardiomediastinal contours
 are stable, and left lung and pleural surfaces remain clear.

IMPRESSION:
Worsening right lower and middle lobe opacities with associated volume loss,
 concerning for a postobstructive process in the setting of a prominent,
 rounded right hilar contour.  Further evaluation with contrast-enhanced chest
 CT is recommended to exclude an obstructing right juxta hilar mass.