Gender identity disorder in a five-year-old boy.

Markedly effeminate behavior in a young boy is a source of concern and confusion for parents, teachers, and the child. It also represents a therapeutic dilemma for the child psychiatrist. The case of a five-year-old boy with gender identity disorder of childhood is presented and the literature on hypotheses of etiology, treatment, and long-term follow-up is reviewed. The ethical and philosophical questions posed by such a case are discussed.