Kisho is an information platform, not a medical provider. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. All content is aggregated from publicly available sources (including ClinicalTrials.gov, PubMed, FDA.gov, and Orphanet) and is provided for informational purposes only. Clinical trial eligibility, treatment decisions, and any health-related actions should always be discussed with a qualified healthcare professional. Kisho does not endorse any specific therapy, organization, or clinical trial. Terms of use · Privacy policy
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.
Features include always present findings: Tented upper lip vermilion, Failure to thrive in infancy, Nevus flammeus, and Decreased muscle mass and others; and common findings: Hypertelorism, Pes planus, and Arachnodactyly. 57 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Head and neck | 6 | Tented upper lip vermilion, Broad face, Cleft palate |
TGFB3 function has not been fully characterized.
Rienhoff syndrome is associated with mutations in the TGFB3 gene on chromosome 14.
Rare examples of non-penetrance in LDS have been documented. In some instances, non-penetrance is explained by mosaicism .
No consensus clinical diagnostic criteria for Loeys-Dietz syndrome (LDS) have been published.
LDS should be suspected in individuals with the following vascular, skeletal, craniofacial, cutaneous, allergic/inflammatory, ocular, and family history findings .
Vascular
Dilatation or dissection of the aorta and other arteries. Aortic root dilatation is seen in more than 95% of probands; the aortic root is the most common site for a dissection to occur. In rare circumstances, aneurysms or dissections can be seen in other arteries in the head, chest, abdomen, or extremities in the absence of aortic involvement.
No approved treatments are currently available for Rienhoff syndrome. The disease remains an area of unmet medical need.
An extensive review of management guidelines for Loeys-Dietz syndrome (LDS) has been published (full text). Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with LDS, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended. Table 6. Loeys-Dietz Syndrome: Recommended Evaluations Following Initial Diagnosis
To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended. Table 8. Loeys-Dietz Syndrome: Recommended Surveillance
No clinical trials have been registered for Rienhoff syndrome.
18 publications have been identified in PubMed for Rienhoff syndrome. Research spans Case Report / Case Series (33%), Epidemiology / Natural History (28%), and Basic Science / Preclinical (17%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 6 | 33% |
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 1:55 AM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Common questions about Rienhoff syndrome
Muscles |
6 |
Decreased muscle mass, Low muscle tone (hypotonia), Delayed gross motor development |
Heart and blood vessels | 5 | Aortic root aneurysm, Mitral regurgitation, Ventricular septal defect |
Growth and development | 4 | Failure to thrive in infancy, Short stature, Tall stature |
Bones and joints | 3 | Kyphoscoliosis, Joint hypermobility, Joint wear and tear (osteoarthritis) |
Arms and legs | 2 | Flexion contracture of toe, Congenital finger flexion contractures |
Pregnancy and birth | 2 | Neonatal hypotonia, Congenital finger flexion contractures |
Digestive system | 1 | Eosinophilic infiltration of the esophagus |
Brain and nerves | 1 | Delayed gross motor development |
Skin | 1 | Reduced subcutaneous adipose tissue |
Eyes | 1 | Ptosis |
Loeys-Dietz syndrome (LDS) represents a wide phenotypic spectrum in which affected individuals may have various combinations of clinical features ranging from a severe syndromic presentation with significant extravascular systemic findings in young children to predominantly thoracic aortic aneurysm/dissection occurring in adults. Clinical variability is also observed among individuals in the same family who have the same pathogenic variant. The most common findings involve the vascular, skeletal, craniofacial, cutaneous, allergic/inflammatory, and ocular systems .
The major sources of morbidity and early mortality in LDS are dilatation of the aorta at the level of the sinuses of Valsalva, a predisposition for aortic dissection and rupture, mitral valve prolapse (MVP) with or w...
Source: GeneReviews — "Loeys-Dietz Syndrome"
Source: GeneReviews — "Loeys-Dietz Syndrome"
• Other arterial aneurysms and tortuosity
Source: GeneReviews — "Loeys-Dietz Syndrome"
FBN1-related Marfan syndrome is a systemic disorder with a high degree of clinical variability. Cardinal manifestations involve the ocular, skeletal, and cardiovascular systems. Cardiovascular manifestations include dilatation of the aorta at the level of the sinuses of Valsalva, a predisposition for aortic tear and rupture, mitral valve prolapse with or without regurgitation, tricuspid valve prolapse, and enlargement of the proximal pulmonary artery. Marfan syndrome is caused by pathogenic variants in FBN1 and inherited in an autosomal dominant manner.
Source: GeneReviews — "Loeys-Dietz Syndrome"
Genetic testing for TGFB3 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for Rienhoff syndrome has been reported in the published literature.
System/Concern | Evaluation | Comment |
|---|---|---|
Craniofacial | Craniofacial exam for evidence of cleft palate craniosynostosis | — |
Allergy/ Gastrointestinal disease | Assessment for clinical manifestations of asthma, food allergy, eczema, allergic rhinitis, /or eosinophilic gastrointestinal disease | Ocular |
Genetic counseling | By genetics professionals2 | To obtain a pedigree inform affected persons their families re nature, MOI, implications of LDS to facilitate medical personal decision making LDS = Loeys-Dietz syndrome; MOI = mode of inheritance; MRA = magnetic resonance angiography 1. |
Loeys-Dietz Syndrome: Treatment of Manifestations Manifestation/Concern | Treatment | Considerations/Other |
Cardiovascular | Persons should be managed in a medical center familiar w/LDS. | Beta-adrenergic blockers or angiotensin receptor blockers (ARBs) to hemodynamic stress |
Source: GeneReviews — "Loeys-Dietz Syndrome"
The following should be avoided:
Contact sports, competitive sports, and isometric exercise. Note: Individuals can and should remain active with aerobic activities performed in moderation.
Agents that stimulate the cardiovascular system, including routine use of decongestants or triptan medications for migraine headache management
Activities that cause joint injury or pain
For individuals at risk for recurrent pneumothorax, breathing against a resistance (e.g., playing a brass instrument) or positive pressure ventilation (e.g., scuba diving)
Source: GeneReviews — "Loeys-Dietz Syndrome"
View trials for Rienhoff syndrome
Evaluation |
|---|
Frequency |
|---|
Cardiovascular | Echocardiography to monitor status of aortic root ascending aorta | At least annually or more often per cardiologist MRA or CTA w/3D reconstruction from head to pelvis to identify arterial aneurysms arterial tortuosity throughout the arterial tree |
Pectus deformity | Clinical assessment | At each visit or as needed Joint manifestations |
Cervical spine instability | Follow-up imaging | Per orthopedist Scoliosis |
Pes planus | Clinical assessment | At each visit or as needed |
Hernias | Clinical assessment for hernias | At each visit or annually Allergic/ |
Source: GeneReviews — "Loeys-Dietz Syndrome"
Phenotype severity distribution: 29 always present features, 3 common features.
5 |
28% |
Laboratory research | 3 | 17% |
Testing and diagnosis research | 2 | 11% |
Other research | 1 | 6% |
Research summaries | 1 | 6% |
van Ee MJ (2026). [PMID: 41885654](https://pubmed.ncbi.nlm.nih.gov/41885654/). *JACC Case Rep*. [Case Report / Case Series]
Yildiz M (2026). [PMID: 41392201](https://pubmed.ncbi.nlm.nih.gov/41392201/). *Eur J Cardiothorac Surg*. [Diagnostic / Biomarker]
Calderon-Martinez E (2025). [PMID: 40533124](https://pubmed.ncbi.nlm.nih.gov/40533124/). *J Am Coll Cardiol*. [Epidemiology / Natural History]
McGrath-Cadell L (2025). [PMID: 40194966](https://pubmed.ncbi.nlm.nih.gov/40194966/). *J Am Heart Assoc*. [Epidemiology / Natural History]
Abdul Nabi H (2025). [PMID: 40482834](https://pubmed.ncbi.nlm.nih.gov/40482834/). *Int J Cardiol*. [Epidemiology / Natural History]
Stathori G (2025). [PMID: 40282317](https://pubmed.ncbi.nlm.nih.gov/40282317/). *Genes (Basel)*. [Basic Science / Preclinical]
Almiqlash B (2025). [PMID: 41173604](https://pubmed.ncbi.nlm.nih.gov/41173604/). *JACC Case Rep*. [Case Report / Case Series]
Koefoed AW (2025). [PMID: 40533122](https://pubmed.ncbi.nlm.nih.gov/40533122/). *J Am Coll Cardiol*. [Case Report / Case Series]
Tsujimoto Y (2025). [PMID: 40469084](https://pubmed.ncbi.nlm.nih.gov/40469084/). *Bone Rep*. [Case Report / Case Series]
Rietz M (2025). [PMID: 39821303](https://pubmed.ncbi.nlm.nih.gov/39821303/). *Eur Heart J Cardiovasc Imaging*. [Other]