Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left perihilar opacity is worrisome for pneumonia . Mild right base opacity is similar to prior , but increased compared ___ , and could represent additional site of infection . No pleural effusion or pneumothorax is seen . The cardiac silhouette size is grossly stable . Mediastinum is grossly stable .
    OUTPUT:
    
New left perihilar opacity worrisome for pneumonia . Right base opacity similar to possibly slightly increased compared to prior , could represent additional site of infection .