Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is opacity involving the left lower lobe concerning for pneumonia . No large effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . Bridging osteophytes are noted in the mid - to - lower thoracic spine . Otherwise , the imaged osseous structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Left lower lobe pneumonia .