It depends on so many factors, your age, your familiar history, if it was estrogen/progesterin positive or negative, if it was HER 2 positive. The actually staging after they look at the cells in pathology to see how closely they resemble a normal cell etc. If there were no positive lymph nodes you chances would be greater that you may not need chemo but if you are younger, they do give chemo because you are not a candidate for some of the oral anti-estrogen medications on the market. Of course, the PET will show if there is any spread. You will just have to wait and see what the findings reveal. I know, believe me I know, this is the hardest part, the waiting. After diagnosed with stage l and being assured that I had a 90 some percent chance of cure I had a bone scan and to my horror it showed uptake in the rib. Talking with my surgeon he went quiet. A follow up bone scan revealed a second lesion and we were talking possibly 2 years (survival) with my oncologist, when he said something just wasn't right. Further evaluation of my tests by an oncologist radiation specialist after now 6 weeks felt it probably was not related to the BC. My doctors were afraid to do any more testing unless I actually had symptoms because something unusual always presented. That was 3 years ago and all is well. So think positive if you can. Let us know how things turn out. God bless and give you patience through all this. I found Ambien to be my friend for awhile.