Loeys-Dietz syndrome 4 (MONDO_0013897, a Monarch Disease Ontology identifier) is any Loeys-Dietz syndrome in which the cause of the disease is a mutation in the TGFB2 gene. Also known as: Loeys-Dietz syndrome caused by mutation in TGFB2, Loeys-Dietz syndrome type 4, TGFB2 Loeys-Dietz syndrome.