Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded and clear without consolidations or effusions . Heart size is normal . There is abnormal prominence of the left hilum . Cardiomediastinal and hilar silhouettes are otherwise normal . Pleural surfaces are normal .
    OUTPUT:
    
No radiographic evidence of pneumonia . Prominence of the left hilum may reflect an asymmetrically large left pulmonary artery and underlying pulmonic stenosis or hilar lymphadenopathy . Recommend correlation with outside hospital imaging if available to establish chronicity .