Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates unremarkable mediastinal and hilar contours . Lung volumes are low with mild bibasilar atelectasis . Otherwise , lungs are clear . There is mild pleural thickening adjacent to the right fifth rib with suggestion of a cortical step - off ; however , the area of concern is obscured by a crossing sixth rib . No other fracture is identified .
    OUTPUT:
    
Possible right fifth rib fracture with small amount of adjacent pleural fluid or hematoma . ___ discussed with Dr . ___ regarding these findings at 4 : 50 a .m . on ___ at the time of discovery .