gender identity disorder

A strong and persistent self-identification with members of the opposite sex and feelings of discomfort and denial about one's ascribed sex role. In gender identity disorders of childhood, children often “cross-dress” and may become convinced they will grow up to be members of the opposite sex. They tend to maintain their preoccupations with the stereotypical activities of the opposite sex despite pressure against this behavior from parents, peers, teachers, and professionals. In adults, transsexualism is the most common of these disorders.