I am so sorry to hear that. I agree with AINTSOBAD, it can spread. I can't give
advice on how to stop it, because mine seem to have spread to an old three year old Hysterectomy wound. It started out in my left hand and arm.
God, I wish I could tell you something different. Only thing I can say is that prayer helps

. And talking to all these good people here

.
God Bless.
Lefty