Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . There is again noted to be a large left pleural effusion with underlying consolidation which could in part reflect atelectasis , though pneumonia can not be excluded . Overall , there may be slight increase in the effusion from prior exam . There is right basilar atelectasis . Mild pulmonary vascular congestion impossible to exclude . The bony structures appear intact . Heart and mediastinal contour can not be assessed due to adjacent consolidation .
    OUTPUT:
    
Increasing left pleural effusion and left lower lung consolidation , likely atelectasis though can not exclude pneumonia .