Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates a 6 .4 cm biopsy proven metastatic melanoma lung nodule which when compared to prior study dated ___ is increased in size and relative to CT chest dated ___ is additionally increased in size , previously 5 .6 cm on most recent study . Additional opacity projects over the left mid to upper lung overlying the left posterior sixth rib in a similar location to prior peripheral nodular opacities on prior chest CT . No focal opacity convincing for pneumonia is identified . There is likely atelectasis at the left lung base . Cardiomediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . A right chest port is identified , its tip terminating within the inferior superior vena cava . No air is identified under the hemidiaphragm .
    OUTPUT:
    
Enlarging left lower pole biopsy proven metastatic melanoma nodule . Interval enlargement of opacities in left mid to upper lung in a similar location to prior clustered nodules on prior CT . While infection is possible , underlying metastatic lesions are not excluded . No new focal opacity convincing for pneumonia .