I was diagnosed this year aged 37. I had tiny boobs so mastectomy was recommended for the breast with cancer and I chose to have bilateral mastectomy. For me it was after the shock of being diagnosed I wanted to deal with treatment in stages and surgery was stage one so do it all in one hit as I didn't want to do again after my treatment finished. I couldn't face it twice and also I didn't want to spend my time when all this is done worrying about getting cancer in the other breast. Hope this helps x