Hi again, kswar
The actual surgery wound healing was pretty good (other than the wider bumpier scar). The geometry of that armpit looks no different to the other side, although both have changed since mastectomy, inevitably. The weird numb-yet-sensitive sensation in and around the armpits - also most likely from the mastectomies when nerves are disrupted. (Important to keep up the stretching exercise regime and scar massaging once healed enough.)
However, I did go on to develop lymphoedema about 6 weeks later. (General statistics suggest only 10-20% of people do go on to develop this, and often not until many years later. I was one of the unlucky ones 
) I went to a couple of specialist massage therapists for manual lymphatic drainage before attended the NHS clinic. Lovely therapist persevered with several lines of attack and eventually after 6 months or so, and the investment in an expensive pump to use at home, it was under control. My hand and arm remain ever so slightly puffy ( not noticeable to others) but other than that it seems to be keeping calm 3 and a half years on.
This may not be what you wanted to hear, but you should know it’s a possibility.
I can’t regret my decision because I was the one who wanted a physical examination of the removed tissue for peace of mind, at least about that aspect !
Best wishes x