Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . Streaky opacities in the left lower lung suggest minor atelectasis . There is , more generally , mild coarsening of interstitial markings and peribronchial cuffing in the mid-to - lower lungs which may suggest airway inflammation or potentially slight fluid overload . A non-displaced fracture involving the right posterolateral eighth rib appears at least subacute and perhaps more remote . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No definite evidence of pneumonia . Mildly prominent interstitium with peribronchial cuffing , which is not specific and could be seen with fluid overload or airway inflammation among other causes , but which is not striking .