Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top - normal in size . The pulmonary vasculature is unremarkable . There is no large pleural effusion or pneumothorax . A vague right perihilar opacity is seen , which in the appropriate clinical context , may represent developing pneumonia .
    OUTPUT:
    
Vague right perihilar opacity , in the appropriate clinical context , may represent pneumonia .