I think your
decision to go for mastectomies, given your
pathology report, is a good one. As to followup: all of the breast tissue will be removed. What will replace it, except for some skin already there, will be tissue and skin from your abdomen. In other words, it's no longer breast tissue and, really, mammography isn't much of use any more. In fact, when it's done, it often shows scar tissue and even calcifications resulting from the surgery which can raise alarm.