Monarch Disease Ontology term MONDO_0014262 (Rienhoff syndrome) is loeys-Dietz syndrome-5 (LDS5), also known as Rienhoff (pronounced REENhoff) syndrome, is characterized by syndromic presentation of aortic aneurysms involving the thoracic and/or abdominal aorta, with risk of dissection and rupture. Other systemic features include cleft palate, bifid uvula, mitral valve disease, skeletal overgrowth, cervical spine instability, and clubfoot deformity; however, not all clinical features occur in all patients. In contrast to other forms of LDS, no striking aortic or arterial tortuosity is present in these patients, and there is no strong evidence for early aortic dissection. Also known as: Loeys-Dietz syndrome type 5.