Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is markedly enlarged with a globular morphology , raising the possibility of a pericardial effusion . There is prominence of the perihilar vessels with vascular congestion but no overt edema . No pleural effusion or pneumothorax . No focal consolidation .
    OUTPUT:
    
Globular enlargement of the heart which raises concern for pericardial effusion . Vascular congestion without overt edema .