Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lung is essentially clear . Slightly increased density along the periphery and base of the left lung is likely due to the pleural - based hematoma seen on the concurrent chest CT . No effusion or pneumothorax . Mild cardiomegaly . Mediastinal contours are normal . Acute fractures of the left fifth through ninth ribs are displaced .
    OUTPUT:
    
Increased density over the periphery and base of the left lung is likely due to the pleural or extrapleural hematoma resulting from multiple left - sided rib fractures .