Cancer usually doesn't go away just like that. There is a chance in situ tumours or benigne tumours "go away" and there is some discussion about what you should

Cancer usually doesn't go away just like that. There is a chance in situ tumours or benigne tumours "go away" and there is some discussion about what you should do with this type of tumour. Not every tumour is cancer. Anyway, even with cancer you can of course bet on dying of another cause before the cancer gets you and thus ignore medical therapy. Some people win this bet ... somehow.