Subject: Is there any such thing as vascular cancer?

I haven't been able to find any information about any kind of cancer of the 
blood vessels themselves. I know that a tumor has to have a good blood 
supply to survive.  If vein and artery cells do not ever become cancerous 
does any one know why? Is there by chance some connection between a tumor 
needing a good blood supply and blood vessel cells being resistant to 
becoming cancerous?
Thanks, Milton Wall

Re: Is there any such thing as vascular cancer?