85. An attractive and well-dressed 22-year-old woman is arrested for prostitution, but on being booked at the jail, she is found to actually be a male. The patient tells the consulting physician that he is a female trapped in a male body and he has felt that way since he was a child. He has been taking female hormones and is attempting to find a surgeon who would remove his male genitals and create a vagina. Which-of the following is the most likely diagnosis?