Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate to large left pleural effusion with overlying atelectasis . The right lung is clear . The size of the cardiomediastinal silhouette is enlarged but unchanged . Multiple compression deformities of the thoracic spine , age indeterminate . Chronic appearing right posterior rib fractures .
    OUTPUT:
    
Moderate to large left pleural effusion with overlying atelectasis , not significantly changed from prior . Age indeterminate thoracic vertebral body compression deformities .