@hulos, I'm with @melclarity on it being an entirely personal decision weather to opt for a single or double mastectomy. I was diagnosed with stage 3, grade 3 triple positive BC in Dec 2016 and am almost through 6 months of Chemo, AC and now Taxol ( 1 more to go ). My tumour had to be shrunk so that I could have surgery and like you I am now weighing up what that may look like. When I mentioned that perhaps I might opt for a double mastectomy my Oncologist couldn't understand why I might be considering that as an option. Her reasoning was I don't have the BRACA gene, each breast is a separate entity and there is as Mel said just as much chance as it coming back in the remaining breast as the next person. I get the thought of you feeling lopsided if you only opt for a single but there's always a 'lift' for the other side available. I am continuing to research and discuss my options and will in the end be guided by my specialists but will ultimately do what is right for me. My Mum had a single mastectomy 20 years ago and has not looked back, but then I have a close girlfriend who opted for a double mastectomy even though her BC was early stage. This is an entirely personal choice and I figure the only right answer is the one that is right for you.