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Grange syndrome is characterized by stenosis or occlusion of multiple arteries (including the renal, cerebral and abdominal vessels), hypertension, brachysyndactyly, syndactyly, increased bone fragility, and learning difficulties or borderline intellectual deficit. Congenital heart defects were also reported in some cases.
Features include sometimes findings: Coronary artery stenosis and Bicuspid aortic valve. 12 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Heart and blood vessels | 3 | Coronary artery stenosis, Bicuspid aortic valve, Renovascular hypertension |
YY1AP1 function has not been fully characterized.
Grange syndrome is associated with mutations in the YY1AP1 gene on chromosome 1.
Genetic testing for YY1AP1 is available. Testing is considered confirmatory for diagnosis.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for grange syndrome.
4 publications have been identified in PubMed for grange syndrome. Research spans Case Report / Case Series (50%), Review / Meta-Analysis (25%), and Basic Science / Preclinical (25%).
Unsel-Bolat G (2026). [PMID: 41882341](https://pubmed.ncbi.nlm.nih.gov/41882341/). *Journal of human genetics*. [Case Report / Case Series]
Yilmaz SO (2026). [PMID: 41937270](https://pubmed.ncbi.nlm.nih.gov/41937270/). *American journal of medical genetics. Part A*. [Case Report / Case Series]
Akalın A (2026). [PMID: 41998823](https://pubmed.ncbi.nlm.nih.gov/41998823/). *Am J Med Genet A*. [Basic Science / Preclinical]
Hausman-Kedem M (2024). [PMID: 38898630](https://pubmed.ncbi.nlm.nih.gov/38898630/). *Vascular medicine (London, England)*. [Review / Meta-Analysis]
Data assembled from 6 of 12 sources · Last updated Sep 18, 2026, 1:44 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
2 |
Recurrent fractures, Increased susceptibility to fractures |
Arms and legs | 1 | Finger clinodactyly |
Kidneys and urinary system | 1 | Renal artery stenosis |
Brain and nerves | 1 | Intellectual disability |