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Blau syndrome associated with a CARD15/NOD2 mutation
Bernadette Snyers1, Karin Dahan
1Department of Ophthalmology, Saint-Luc University Hospital, Brussels, Belgium. snyers@ofta.ucl.ac.be
American Journal of Ophthalmology
|December 13, 2006
Summary
This study identifies a new family with Blau syndrome, a rare genetic disorder. A CARD15/NOD2 gene mutation was found, highlighting its role in Blau syndrome and potential for diagnosing childhood uveitis.
Area of Science:
- Genetics
- Ophthalmology
- Rheumatology
Background:
- Blau syndrome is a rare autosomal-dominant autoinflammatory disease.
- It is characterized by the triad of granulomatous dermatitis, arthritis, and uveitis.
- Mutations in the CARD15/NOD2 gene are the known cause.
Observation:
- A new family with three affected relatives exhibiting Blau syndrome was evaluated.
- Clinical assessment revealed characteristic organ involvement, including severe ocular manifestations like bilateral band keratopathy, cataract, iritis, vitritis, and granulomatous choroidopathy.
- Genetic analysis identified a shared haplotype and a heterozygous pathogenic CARD15/NOD2 mutation (p.R334W) in affected individuals.
Findings:
- The study confirms a CARD15/NOD2 mutation as the cause of Blau syndrome in this family.
- Ocular manifestations were prominent and severe in the affected individuals.
- Genetic linkage and sequencing pinpointed the specific mutation responsible.
Implications:
- Early identification of CARD15/NOD2 mutations can aid in diagnosing Blau syndrome.
- This finding is crucial for the differential diagnosis of childhood uveitis, potentially preventing severe visual impairment.
- Understanding the genetic basis of Blau syndrome aids in genetic counseling and management strategies.
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