Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal upright view of the chest was obtained . The heart is of normal size . Large bilateral hilar lymph nodes are slightly decreased in size since ___ . The lungs are clear without focal or diffuse abnormality . The pulmonary vasculature is unremarkable . No evidence of pneumothorax , pleural effusion , or pneumoperitoneum . No radiopaque foreign bodies .
    OUTPUT:
    
Bilateral hilar lymphadenopathy . No evidence of pneumothorax or pneumoperitoneum .