Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . Consolidative opacity within the periphery of the left upper and mid lung field is noted concerning for pneumonia . Small left pleural effusion is present . The right lung is clear . There is no pulmonary edema . No pneumothorax is seen . There are no acute osseous abnormalities . Multilevel degenerative changes in the thoracic spine are seen present .
    OUTPUT:
    
Consolidative opacity within the left upper and mid lung field peripherally is concerning for pneumonia . Small left pleural effusion . Followup radiographs after treatment are recommended to ensure resolution of this finding .