@hulos It is such an individual decision, one thing Ive learnt after 6yrs and been through it twice is, I'd never opt for a biopsy again, as only surgery gives a correct pathology. I had a 2nd major lumpectomy in 2015 to remove my 2.5cm tumor Grade 3 Stage 2 ER+. As I had a recurrence, once I finished Chemo in December 2015 both my Surgeon and Oncologist said to think about a Mastectomy just in case it came back again. So it took me a year to think about it LOL, I'm actually 2 years clear now, but I did have a single mastectomy/diep flap reconstruction done in February this year. I don't feel like I lost a breast at all as its still my tissue, just my tummy LOL and most of the breast skin, lost the nipple but I was amazed how the panic I had prior dissipated after. As far as taking my right off, NOPE, I did genetic testing and it was negative, they said the odds on my diagnosis of it in the right was random as much as the normal population. So I figured why get rid of something that's not broken I guess. My pathology of course of mastectomy was perfect, so realistically? I got rid of a perfectly good boob. It's a tough one, its so INDIVIDUAL honestly, its what you want, nobody else. I had heaps say to me get them both off like it was a sore toenail...ummm piss off!!! usually people who have no clue of the complexity of it. So I learnt to be true to me, and do what I wanted to do. Of course be guided by your specialists and their recommendations, I did and have followed what they wanted and their happy too in that they didnt feel it necessary to take my right side.So I'm healthy, getting on with life as best I can with side effects and changed quality of life. Its super personal, if it gives you more peace of mind to do the double, honestly do it. Hugs Melinda