Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heterogenous peribronchial opacity at the left lower lobe is concerning for pneumonia . The remainder of the lungs are clear . There is no pleural effusion or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are normal . No upper abdominal or osseous abnormality is identified .
    OUTPUT:
    
Left lower lobe pneumonia .