The mental disorder of transgenderism is curable. Psychiatric disorders can be cured. It's a matter of one's mental psychological state. There are different methods people can be cured of mental disorders. Spiritual transformation is also another method that can and has cured people of mental disorders. Here's some support for that method.
Originally Posted by mican333
Transsexual Returns to Original Gender After Relationship With Christ
"Because the real truth that Christ is alive is the fact that you see a transformed life. And so what happened in my life is that when I finally... got down on my knees and was working through these things many years after I had accepted Christ – probably 10 to 15 years after I accepted Christ – I finally felt that I was broken enough as a man that I got on my knees and prayed."
He says that one day he had a vision while praying with his psychologist. He saw Jesus pick up a baby version of himself, look at him and say, "You will now be saved with me forever." From that point on he could feel the Holy Spirit moving and guiding him in his life.
Today, Heyer says he no longer struggles with his gender identity and uses his testimony to speak out in support of those who have similar struggles and against those who advocate sex reassignment surgery as the solution to the gender identity problems.
Then there's this:
Treatment of GID
Gender Identity Disorder in children is a highly treatable condition. The majority of children treated by those with expertise in this area are able to embrace the goodness of their masculinity or femininity. Over the past 30 years, Dr. Kenneth Zucker, a psychologist and head of the gender-identity service at the Center for Addiction and Mental Health in Toronto, has worked with about 500 preadolescent gender-variant children. In his studies, 80 percent grow out of the behavior, but 15 to 20 percent continue to be distressed about their gender and may ultimately change their sex. Dr. Zucker tries to "help these kids be more content in their biological gender" by encouraging same-sex friendships and activities like board games that move beyond strict gender roles."