Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There is no pneumothorax . Obliteration of the left hemidiaphragm is likely due to a combination of pleural effusion and atelectasis , although underlying consolidation is not excluded . Atelectasis is also again seen at the right lung base . The upper abdomen is unremarkable . Elevation of the left hemidiaphragm is unchanged
    OUTPUT:
    
Opacity at the left lung base , which may represent pleural effusion with atelectasis . However , underlying consolidation may have this appearance , and clinical correlation is recommended .