Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval increase of the cardiac silhouette which raises the suspicion of an enlarging pericardial effusion . An anterior mediastinal mass is again noted and better characterized on prior chest CT . There is bibasilar atelectasis , left greater than right . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
1 . Interval increase in cardiac silhouette , which raises the suspicion of an enlarging pericardial effusion . 2 . Bibasilar atelectasis , left greater than right . 3 . Large anterior mediastinal mass , better characterized on recent chest CT .