Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . Bilateral perihilar regions appear less well aerated with slightly increased opacification . The heart is mildly enlarged . The mediastinal and hilar contours are stable . There is no pleural effusion , pneumothorax , or pulmonary edema .
    OUTPUT:
    
Possible perihilar pneumonia . Oblique views may be obtained for confirmation now , otherwise we suggest a repeat study in 24 hours if patient does not declare clinically .