Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . The left lower lobe opacity seen on the recent prior study persists and is consistent with pneumonia in the correct clinical setting . However , there is mild increase in interstitial markings without alveolar opacities , consistent with mild pulmonary edema .
    OUTPUT:
    
Persistent left lower lobe opacity consistent with pneumonia . New mild pulmonary edema .