Asperger Syndrome is a pervasive developmental disorder of unknown origin, characterized by pedantic language, lack of reciprocity in social interactions, unusual interests, motor clumsiness and normal or above average intelligence quotient, among other symptoms. Since 1994 it has been defined as a specific entity. We describe the case of a boy with this syndrome, with elevated body weight and height and sexual identity disorder. These alterations have not previously been described in the scientific literature on Asperger syndrome.