Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left - sided pleural effusion present with blunting of the costophrenic angle . Trace pleural fluid is seen on the right side as well . There is associated compressive atelectasis at the left side . A paraesophageal hernia is present . Heart size is normal . There are aortic arch vascular calcifications present . Mild degenerative change is present throughout the thoracic spine .
    OUTPUT:
    
1 . Moderate left pleural effusion . 2 . Paraesophageal hernia .