Brain mets

I had a tiny lesion 5mm last fall and I had stereotactic surgery to remove it. Well it is back in the same place but bigger. We noticed this summer that it had grown but thought it was scar tissue so my Dr. told me to get re-scanned in 8 weeks and now it is 1.3 cm by 2 cm. It is non-encapsulated and some of it may be scar tissue. I have no s/e but some edema. I am going to go to NYU for gamma knife. My Drs. prefer that I get another craniotomy but I have already had 2!! I am so heart broken and feel so hopeless.