Thanks Rubyslippers for the research & knowledge. This is all new to me as I was just diagnosed on Nov 2023 and was informed that I had DCIS stage O and would need a lumpectomy and then 3 weeks of radiation because they caught it so early. No one wants to hear they have cancer, but they said for me thus was tge best situation I could ask for, so I wrapped my head around surgery & sone radiation. No big deal! Then after surgery on March 25th, my pathology report showed thzt one small 2.2mm tumor that was not picked up by the needle biopsy and it was invasive. Changed things for me, now because of that tiny tumor that was removed. I am looking at chemo. I just need all the info and knowledge that I can get, to wrap my head around if going through the side effects of chemo is worth it for such a small tumor. So, thank you again for thr info thzt I can ask my doctor.