Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen small apical pneumothorax is unchanged in appearance from the prior radiograph on ___ at 18 : 53 . There is no pneumothorax on the left . Stable scarring at the left base is unchanged . There is no new consolidation . There are no definite pleural effusions . The cardiomediastinal silhouette is normal . Stable right and left healed rib fractures are unchanged .
    OUTPUT:
    
Unchanged small right apical pneumothorax .