My thoughts too Marge. 10 years to an adult is nothing really, but to a child who was nearly 4 when 'taken', she would only know the people she is now with, a bond most likely has been formed. Also she could speak a totally different language. 

If she is found of course, and then reunited with her parents, and her two siblings, what on earth could all that do to her mentally. 

Of course where there is hope there is that chance she will be found soon, but after all this time it seems doubtful.