I assume that you had a reduction done years ago and now have lost some of the volume you once had and want it back. This does happen not infrequently where a young girl had a reduction in her late teens or early 20's, then had children and lost her breast volume. An implant can certainly be placed in that situation but with the scarring from the reduction (both externally and internally), I would anticipate the need for a revision of some sort once you're healed. The skin does not stretch in an easily predictable manner so there is a lot of hand-holding after the procedure. I have done this on multiple occasions and although not many needed revisions, they don't come out quite the same as someone who's never had surgery before. Interview a few different surgeons and pick one who has some experience with this. Good luck!