Tumors return because they're still in the bloodstream. Dr. Christopher (master herbalist) says. He has a 'blood stream' formula that cleans the bloodstream and a formula that cleans out the bowel too- so that all the c.a.n.c.e.r cells can be eliminated out. Type in herbal legacy Dr. Christopher tumors. You'll see what he says there. Hope this helps- it's VITAL information.
Best to detox the whole system I'd say- liver and all.