Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of chest were examined . The heart size is normal . There is an abnormal lobular contour of the aortopulmonary window , which may be due to lymphadenopathy . There are increased perihilar interstitial markings of uncertain chronicity . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
1 . Somewhat lobular contour of the aortopulmonary window , which may be due to lymphadenopathy , although not necessarily reflecting a true abnormality . Correlation to prior chest radiographs is recommended . If not available , chest CT may be obtained for further evaluation . 2 . Increased perihilar interstitial markings of unknown chronicity . If acute , this may represent mild vascular congestion . If chronic , this may represent airway inflammation . Correlation with prior radiographs would be helpful . Dr . ___ ___ these results via email to Dr . ___ at 6 :24 PM on ___ .