Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There has been interval development of a small left pleural effusion with overlying atelectasis . Linear left base scarring is again seen . No focal consolidation is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are stable , with the aorta is somewhat tortuous and calcified . The cardiac silhouette is not enlarged .
    OUTPUT:
    
Interval development of small left pleural effusion .