FWIW, I had a similar size AN and most of the MD consultations said to do the surgery not radiation. And, in fact, I like you, did want this 'thing' out of my head. That said if you keep looking you will find someone who will offer radiation over surgery. I found someone too who would go with radiation although everyone else said surgery. At that point I had already made up my mind for surgery. Once again, as others have said, you have to choose the treatment that YOU want. If you see enough specialists there will always be at least one who differs from the others, but you need to take in what they all say then decide what you think is right for you.