I don't know if its every really cut (excuse the pun) and dry. I had a breast biopsy but the doctor said the lymph node was so small it wasn't worth doing a biopsy on that so left it. I had a mastectomy (my choice) which turned out a good thing as the other side of the breast had started some odd activity as well and ONE sentinel node out. Guess what, sentinel node was positive so back in to surgery to have ALL nodes out and every one was negative. Sheesh! I am still pissed off he didn't take a few nodes rather than one as if the others were negative I wouldn't have probably needed a second surgery. I probably would not have lymphedema in my arm. I wouldn't have two scars which seem to trap stuff between them so I am always doing massage to get it to go away. Since the one node was positive, chemo was sort of a given then. It wasn't easy but I got through it. I focus on the alternative, I am not dead from breast cancer and that's a very good thing. :)