Encasement of the inferior vena cava

Has anyone experienced growth of the tumor around the inferior vena cava?  My last CT showed partial encasement of the IVC but it was done in the ER to look for something else, the ER doctor didn't mention it, and of course, I can't reach anyone in the cancer center to tell me what that means in terms of symptoms/prognosis.  It can't possbly be making things any better.

Thanks.