Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased left basilar opacity with air bronchogram is concerning for infectious etiology . Low lung volumes and right basilar atelectasis are slightly worse than on previous examination . No significant pleural effusions or pulmonary edema are present . Cervical fusion hardware is noted , unchanged .
    OUTPUT:
    
Left basilar consolidation concerning for pneumonia .