Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A spiculated retrocardiac mass appears increased in size with a small left pleural effusion . Increased interstitial opacities in the right lung raise concern for lymphangitic carcinomatosis . Heart size appears grossly stable . Mediastinal contour is unremarkable . Bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Interval progression in size of left retrocardiac mass with increased right lung interstitial opacities concerning for lymphangitic carcinomatosis .