People who choose alternative methods to cancer treatment.....Who gives them the diagnosis of cancer?

Dude you can have your blood sent into labs without any kind of doctor and have it tested forcancer. I'm kinda confused bythe question. Is that ur only question whether or not alt. Meders should be able to declare cancer or not? Of course I blieve in free will to choose what u want to heal and people have that choice. Well at least here I know some places don't allow alt med... sad really. I mean if people are willing to pay, then who is to say they can't choose that