Hi there it's definately a very personal decision I was diagnosed may 2016 left boob grade 3 stage 2a no lymph nodes involved and scans clear. I was given the choice of lumpectomy chemo and radiation or mastectomy and chemo( 8 rounds) I opted for the latter as I didn't want chemo and radiation. Then 6 months later I took the other one off as a preventative measure. I was told too it's not necessary but no one could tell me for sure that I wouldn't get it in the other side. And I've read about enough women who this has happened too and my gut instinct and after long discussion with hubby I decided this was best for me and I don't regret it. Just waiting for my recon which I'll talk about in the bc recon forum as I have a few questions. Everyone is different and like I said this was the decision I made. It makes me feel better as I know there's always a small chance of recurrence occurring elsewhere but at least I've reduced the risk somewhat. I also was not keen on always having to have bloody mammograms. Good luck with it you will know what's right for you. Margie