Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is a large left pleural effusion . The right lung is clear of consolidation . Trace blunting of the posterior costophrenic angles suggest trace effusion . There is mild pulmonary vascular congestion . Cardiomediastinal silhouette can not be assessed given silhouetting the left heart border . No acute osseous abnormalities .
    OUTPUT:
    
Large left pleural effusion with probable underlying atelectasis noting infection can not be excluded . Pulmonary vascular congestion .