Monarch Disease Ontology entry MONDO_0003731 (adult central nervous system teratoma) is a mature or immature teratoma affecting the central nervous system and occurring in adults. Also known as: Central nervous system teratoma, adult CNS teratoma, central nervous system teratoma of adults, teratoma of adult CNS, teratoma of adult central nervous system, teratoma of the adult CNS, teratoma of the adult central nervous system.