Unless I read it wrong, it seems that the only way It can return is if you get "lipo" done only on your chest. From what I can tell if you actually have excision surgery it wont come back.
"Excisional surgery for both pseudogynecomastia and gynecomastia, with or without added liposuction for contouring of the chest and upper abdomen, ensures flat chests and no partial return of breast enlargement "