Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen left pigtail catheter is no longer visualized . There has been interval accumulation of a small to moderate size left pleural effusion with some degree of underlying collapse and / or consolidation , though there is relative translucency of the left lung base itself . Air bronchograms are seen in the retrocardiac region . There is upper zone redistribution , without overt CHF . The cardiomediastinal silhouette is probably unchanged . Minimal atelectasis at the right base , but , in the right lung , no focal infiltrate , consolidation , or effusion . No pneumothorax detected .
    OUTPUT:
    
Left lung base pigtail catheter no longer visualized . Interval development of small to moderate left effusion with underlying collapse and / or consolidation . If clinically desired , a left - side - down decubitus view a help to better quantify the amount of pleural fluid .