Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Re - demonstrated is a right basal pneumothorax . A drain projects over the right lower hemithorax . There is persisting atelectasis and airspace opacification in the right lower lobe as well as a layering right pleural effusion . A small left pleural effusion is present with overlying atelectasis . The right hilar and right apical masses , lymphadenopathy and osseous metastases were better evaluated on the CT scan dated ___ . The appearance of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No significant interval change since the prior examination .