Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left lower lobe opacity projects over the spine on the lateral images . There may be additional right lower lobe opacities as well . Cardiomediastinum is widened but unchanged from prior exam . The right lung is essentially clear . No obvious pleural effusion is seen . No pneumothorax .
    OUTPUT:
    
Left lower lobe pneumonia .