It is an infuriating reality that the new tissue, so purposeless and unaware, is more vital than that delicate and complex part of you that, if it is not your soul, is your soul s tabernacle. Ridding yourself of the gang is one of the most challenging problems in medicine. If you cut up a chicken and throw away the giblets, new giblets do not grow back on the chicken. But with a living body, the giblets do want to come back, because the only instructions they need to follow in order to survive is to keep growing. All you need to replicate is a single cell, following surgery or radiation, or chemical therapy.
All tumors blur into the body.
To get it all, you have to cut into the good stuff. Even then, there is always a remaining cell. I have spoken to meningioma patients who have had eight craniotomies to remove eight meningiomas. The little bastards keep coming back. And, yes, you can use that as a testimonial if it helps.