Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided Port - A - Cath terminates in the right atrium , unchanged from prior . A large rounded opacity within the right lung base is better characterized on recent prior CT and corresponds with known metastatic disease . Known subcarinal lymph nodes are not well characterized on this chest radiograph examination . The remainder of the lungs appear clear . There is no new focal consolidation or pneumothorax . There is no vascular congestion or large pleural effusions . Cardiomediastinal and hilar contours are within normal limits . Surgical clips are seen within the right hilum and are unchanged from prior .
    OUTPUT:
    
1 . Unchanged right lung base mass corresponding with known metastatic disease . 2 . No acute cardiopulmonary process .