Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Consolidative opacity in the left lower lobe is concerning for pneumonia . The right lung is clear . No pleural effusion or pneumothorax is identified .
    OUTPUT:
    
Left lower lobe pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding .