Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there is a persistent small right apical pneumothorax . Two right chest tubes are in unchanged position . Opacities in the right apex are likely related to scarring and post-operative changes . There is atelectasis at the right lung base . Left lung is unchanged in appearance with extensive bullous disease in the upper and mid lung portions and atelectasis at the lung base . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Persistent small right apical pneumothorax .