Dear dmoore: It depends specifically on her circumstances. Please refer to the following. This information regarding phyllodes tumor is directly from the textbook
I had a phyllodes tumor removed 3 years ago via a masectomy. Mine was benign. What stage is your sister in law's in?
I had reconstruction surgery following the masectomy. I have regained a normal life. No problems.
My bigggest struggle has been with the fact that I did not have cancer but the insurance companies view me as though I did.