Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following placement of a pigtail pleural catheter in the lower right hemithorax , a large right pleural effusion has substantially decreased in size with residual moderate amount of pleural fluid remaining . A moderate - sized right pneumothorax has developed , with a very small apical component but more substantial lateral and basilar component . The underlying lung in the right middle and lower lobes is partially atelectatic , but the right upper lobe is relatively well expanded . Cardiomediastinal contours are stable in appearance . Left lung and pleural surfaces are grossly clear . Lytic skeletal lesions are consistent with known metastatic disease .
    OUTPUT:
    
1 . Decrease in right pleural effusion following pigtail pleural catheter placement and development of a moderate hydropneumothorax . 2 . Lytic rib metastases .