[roz123]

hi there
this is a reallytough decision, one that i struggled with. I actually made the decision to do prophy bilateral msx after I completed all treatment. I wanted to wait to make sure that I was not making the decision based on fear and not on facts. The facts are that msx or lump plus rads are the same in terms of survival. The reasons I made the decisions (and these are personal ones)
1. I am young aswell (43) and figure I haven't even hit my high risk BC years so I want to reduce my risk of a new breast cancer
2. Doctors have told me my risk for a new primary is 20% - which may or may not seem high to some but I only had a 3% risk factor for getting BC at my age in the first place (zero family history, no risk factors other than dense breasts) so to me that number seems really high
3. Being her2, even if i was watched really closely on the remaining healthy breast and a new cancer was discovered, unless it was dcis or extremely tiny (under 3mm) then I would get chemo again.
I would speak to your doctors about what your lifetime risk is of getting a new primary, that may or may not help your decision. Like the others have said you can wait if you have any doubts and do the other side at a later date once you have had more time to think about it.