Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . No prior . Lungs are clear of focal consolidation or large effusion . There is enlargement of the cardiac silhouette . Prosthetic valve and median sternotomy wires identified . No acute osseous abnormalities .
    OUTPUT:
    
Enlargement of the cardiac silhouette which could be due to cardiomegaly , although given history and configuration , pericardial effusion is certainly possible .