Leonor, My first "session" was to mop up any stray cells that may have been left behind after surgery. (as far as I knew this was routine) I had clear margins and no lymph node involvement (that they could see). I did not have chemo back in 2006/2007 because there appeared no need to. I was put on Tamoxifen as the bc was Hormone positive. All of my scans etc were good for 2.5years when it was noticed that there was a suspicious lymph node right up under my armpit and around near my back shoulder. (same breast side) Nothing was done for 18 months when it was noticed to be growing. My surgeon removed it but because of the location he could not get clear margins. I was recommended to have radiation first - "to hit the spot". They did a very wide area of radiation - to be sure then I had chemo. My surgeon calls it secondary bc in the lymph nodes but I really think I was unlucky and this little "sucker" was missed the first time around - due to its location. As far as the Radiation Oncologist thinks - I am now cured?????? Who knows but I wanted to give it my best shot!!! It is all about what you think is best for yourself. It might be worth talking to the Radiation Oncologist and voicing your concerns. XLeonie