@Artferret
At my original diagnosis appointment I was informed that radiation would be required. I psyched myself to that information. At the post surgery consultation (lumpectomy) the breast surgeon ( the witch from hell - no bedside manner at all ) said no radiation, but here take this letrazole.
I refused the letrazole (had pre existing medical conditions that were not wise to aggrevate by taking letrazole). So that stuffed her trial. Good thing, I still have radiation in the gun cabinet for next time.
Being a very crafty person I feared vision problems on letrazole more than I feared a recurrence.
Was not too fussed about the radiation not being used as I had clear margins and no node involvement. I was more annoyed (read ANGRY) about the treatment change after having resigned myself to being away from home for 5 weeks and cancelling a much looked forward to holiday to New Zealand.
So to answer your question, treatment decisions were not mine but the medical team's. I had no input at all. Except for my refusal to take letrazole.