Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . An ill - defined nodular opacity projecting over the periphery of the lingula is noted , not seen clearly on the lateral view . Right lung is clear . The cardiomediastinal silhouette , hilar contours and pleural surfaces are normal . No pleural effusions or pneumothorax is present .
    OUTPUT:
    
Ill - defined opacity projecting over the periphery of the lingula is concerning for pneumonia .