FeebleGimmick

There was a similar story re: extreme weight loss and excess skin, photos etc, in /r/fitness recently:

http://www.reddit.com/r/Fitness/comments/1nwo5o/progress_male_17_year_old_350_191_159_lost_not/

If I were you I would go beast mode for a year or two and fill it out with muscle before considering surgery. It'll spring back naturally to some extent in that time as well.