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Kousseff syndrome: a causally heterogeneous disorder
K Maclean1, M J Field, A S Colley
1Department of Medical Genetics, Sydney Children's Hospital, Sydney, Australia.
American Journal of Medical Genetics. Part A
|January 7, 2004
Summary
Kousseff syndrome, characterized by sacral myelomeningocele and heart defects, is a causally heterogeneous disorder. Further research is needed to understand its genetic basis.
Area of Science:
- Medical Genetics
- Developmental Biology
Background:
- Kousseff syndrome is a rare condition characterized by sacral myelomeningocele and conotruncal cardiac anomalies.
- Previous studies suggested a potential link to chromosome 22q11.2 microdeletions, but its distinct entity status was questioned.
Observation:
- Two new cases of Kousseff syndrome are presented: one with sacral myelomeningocele, tetralogy of Fallot, and normal 22q11.2 FISH testing, and another with sacral myelomeningocele and a confirmed 22q11.2 microdeletion.
- The first case showed no mutation in the CITED2 gene and lacked typical velocardiofacial syndrome features.
Findings:
- The findings indicate that Kousseff syndrome is not a single entity but rather a heterogeneous disorder with potentially diverse genetic causes.
- The presence of a 22q11.2 microdeletion in one case supports its role in some instances of Kousseff syndrome.
Implications:
- This study highlights the importance of comprehensive genetic testing in cases presenting with Kousseff syndrome.
- Understanding the heterogeneity of Kousseff syndrome is crucial for accurate diagnosis, genetic counseling, and the development of targeted therapies.
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