Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of normal size . An ill - defined opacity is present in the right upper lobe laterally . Bilateral hila appear slightly enlarged . No pleural effusion or pneumothorax . Osseous structures are unremarkable . No radiopaque foreign body .
    OUTPUT:
    
Right upper lobe ill - defined opacity , likely reflective of pneumonia in the correct clinical setting . Hilar prominence is suggestive of underlying lymphadenopathy , and further evaluation with chest CT can be obtained in this patient with a history of sarcoidosis .