Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent enlargement of the cardiac silhouette . Mediastinal contours are stable . There is blunting of the posterior left costophrenic angle suggesting trace pleural effusion , similar to prior , concerning for trace pleural effusion . No focal consolidation is seen . There is no evidence of pneumothorax . No overt pulmonary edema is seen .
    OUTPUT:
    
Persistent enlargement of the cardiac silhouette , which could be due to underlying cardiomyopathy or pericardial effusion . Persistent trace pleural effusion . No overt pulmonary edema .