Hi Karen - I am sorry to hear that you feel this way.  Myself I feel that after 8 breast surgeies, all the numerous tests, dr. visits, and radiation - that exposing myself is no big deal anymore.  You get used to it over time. I'm not sure what type of "marker" I have placed within my chest wall, but my breast surgeon put it in there when she removed the remaining cancer after I did not get clear margins the first time.  It was something that she and my radiation oncologist decided, so it would make getting localized radiation more exact.  I'm just not sure what metal make up it is.  It's been inside my breast along with a tissue expander as I was going through reconstruction when my plastic surgeon found my cancer returned (cancer twice in a 3 yr period!).   I have not had any problems with it, but I also know that it will most likely be removed once radiation is complete and I finish up the reconstruction process.   I hope for your sake you get to the bottom of this problem and are feeling better soon! Best of luck to you! Angi