Anus, ImperforateAbbreviations as TopicAbortion, EugenicRectovaginal FistulaAbnormalities, MultipleRectal FistulaUrogenital AbnormalitiesPerineumSurgically-Created StructuresAnus NeoplasmsCloacaBladder ExstrophyAnal CanalAnus DiseasesSyndromeMedical Subject HeadingsInfant, NewbornPubMedTerminology as TopicNatural Language Processing