Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac silhouette remains markedly enlarged . Mediastinal contours are stable . No pulmonary edema is seen .
    OUTPUT:
    
Marked enlargement of the cardiac silhouette , could be due to underlying cardiomyopathy or pericardial effusion . No focal consolidation or pulmonary edema .