Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiograph from ___ , large right paramediastinal mass with unchanged appearance . No definite pneumothorax identified . Left - sided Port - A - Cath tip terminates at the cavoatrial junction . No focal consolidation or effusion . Cardiomediastinal silhouette is stable . Mild right convex scoliosis of the thoracic spine and left convex scoliosis of the lumbar spine .
    OUTPUT:
    
No definite pneumothorax identified . If there is persistent clinical concern , expiration views can be obtained for further clarification .