If you have DCIS with no other implications, why consider anything else after a mastectomy? Radiation, perhaps, but the rest with your history would be a hard pas for me. You know your body better than anyone. Do you you think is right ask three doctors, breast surgeon, plastic surgeon and your personal doctor. Get all the information you can , and you decide. With all that expertise in your pocket and what you know about yourself, should be the best indicator of what you should do. But, this decision is a hard one!!