MONDO_0009857 (persistent Mullerian duct syndrome) (PMDS) is a rare disorder of sex development (DSD) characterized by the persistence of Müllerian derivatives, the uterus and/or fallopian tubes, in otherwise normally virilized boys. Also known as: PMDS, persistent Muellerian duct syndrome, persistent Mullerian derivatives, persistent Müllerian derivatives, persistent mullerian duct syndrome, type I, persistent mullerian duct syndrome, type II.