Boys with Bilateral Undescended Testes (Normal Phallus)

End

Testes present

Testes absent

Operate to bring down testes (or observe if <1 year of age)

Operate to bring own testes (consider persistent Müllerian duct syndrome)

No sergery required (anorchia)

Serum Müllerian inhibiting substance assay

Normal levels

Undetectable levels

Stimulate with human chorionic gonadotropin

Increase in testosterone

No testosterone response