Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are moderately well - expanded . No CHF , pleural effusion , pneumothorax , or focal airspace consolidation is detected . There is minimal atelectasis at the left lung base . Heart is not enlarged . . Mediastinal and hilar contours are within normal limits . There is a minimally displaced fracture of the left ninth rib . Subtle thickening of the right fifth rib laterally may reflect an old healed rib fracture .
    OUTPUT:
    
Minimally displaced fracture of the left ninth rib . No pleural effusion or pneumothorax .