FINDINGS:
There is subtle increase in interstitial markings, most noted in the mid to
 lower lung field which may be due to atypical infection versus mild
 interstitial edema.  No lobar consolidation is seen.  There is no large
 pleural effusion or pneumothorax.  The cardiac and mediastinal silhouettes are
 stable.  Mild prominence of the hila; differential diagnosis includes vascular
 congestion less likely lymphadenopathy.