Definitions sometimes bother me.

'Cancer cells' is something I read a lot. But they are and they
aren't. They are your own cells made by your own body. That's why
your body doesn't try to kill them. The difference is that they don't
die like normal cells - they just keep multiplying. So a better term
would be 'cancerous cells' and that might clear up a lot of confusion
in the naturopathic marketplace.