Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen left lower lobe pneumonia has appeared to decrease in the interval however there is right base opacity worrisome for right base pneumonia . No pleural effusion or pneumothorax is seen . The cardiac silhouette is mildly enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Findings worrisome for right basilar pneumonia . Interval improvement in left base pneumonia .