question: Hello doctor, I am writing a fiction novel about scientific abnormalities. I think there is no better professional than a doctor to ask this. What would happen if a tumor is left untouched in a human? What happens after the tumor takes over their life? Would it eventually conquer all of the victim's body? What would be the end result? Would it count as a separate organism once it overtakes the body? This question is not meant to disturb your work, it is only for the development of ideas. If you find this question unethical or offensive please ignore it.