How about some astragalus?
"Astragalus boosts the immune system; but at the same time it seems to possess the ability to ´light up´ the rogue cells so that the immune osystem can ´see´ them better and attack more of them. Possibly for this reason, MD Anderson concluded in research with patients on radiotherapy treatment, that it could double survival rates. It may also benefit liver function, seems to reduce side-effects of chemotherapy, reduces metastic spread and increases survival times."
http://m.canceractive.com/cancer-act...ink.aspx?n=536