Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . A left perihilar consolidation has resolved but now there is a new extensive opacity involving the posterior left lower lobe which is consistent with pneumonia . A vague opacity in the lateral right upper lobe is probably unchanged and may reflect a mild form of chronic scarring in the area . There is no definite pleural effusion . There is no pneumothorax . A thin anterior flowing syndesmophyte is noted along the mid through lower thoracic spine .
    OUTPUT:
    
Findings consistent with left lower lobe pneumonia .