cancer is very dynamic. you can have treatment without success, you can have treatment with success, you can have no treatment and it can vanish or you can have no treatment and it does not disappear.
There is no clear evidence that treatment is effective. And no evidence to show that not having treatment is more effective
Apparently, everyone develops cancer cells at some point but our body's take care of it and they constantly vanish and reappear without causing any problems. There is also evidence of postmortem examinations of people who died of completely different causes but all had some cancer cells. Cancer might not be as deadly and fearful as we think. Could it not be that treatment such as chemo is only killing those with cancer?? we just cannot know for sure. Cancer has three options, with or without treatment, it can vanish, it can stay they way it is or it might grow and spread.