Went to GP yesterday-wanted reassurance that it was somehow related to radiation. (finished 10 May 2011). I have 1 spot especially on same side as lumpectomy on my rib cage that is really sore espcially if apply pressure-I have stopped wearing a bra again. I have a bone scan booked for the 16 Sept.....Chest x ray showed nothing. Have looked on a few international blog sites and lot of people attribute problems with ribs to radiation. Just google rib pain and breast cancer. Maybe you should request a bone scan for reassurance......I was sick of worrying about mine. Good luck
Wendy