Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is top normal . Mediastinal and hilar contours are unchanged . The pulmonary vasculature is normal . Left lower lobe consolidative opacity is demonstrated with a small left pleural effusion . Right lung is clear . No pneumothorax is noted . There are no acute osseous abnormalities . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Left lower lobe pneumonia with small left pleural effusion . Followup radiographs after treatment are recommended to ensure resolution of this finding .