Alan Finch at 19 was a transsexual. At 21 he underwent sex change surgery and became Helen Finch. By the age of 30, Alan returned to his birth gender. He was misdiagnosed with gender identity disorder.
Alan now understands what he needed was simple psychotherapy, not sex change surgery.
You can look up the Australian documentary called Boy Interrupted, seen on Australian Story on September 1, 2003.