Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . A right - sided internal jugular central venous catheter is seen terminating at the cavoatrial junction / right atrium . Large left pleural effusion is again seen , grossly stable compared to prior study given differences in patient position . The cardiomediastinal silhouette is stable with the left aspect of the cardiac silhouette not well assessed due to the large left pleural effusion . The patient is status post median sternotomy and CABG . The right lung is similar in appearance .
    OUTPUT:
    
Large left pleural effusion , grossly stable given differences in patient position .