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Donnai-Barrow syndrome: four additional patients
Nicolas Chassaing1, Didier Lacombe, Dominique Carles
1Service de génétique médicale, Hôpital Purpan, Toulouse, France.
American Journal of Medical Genetics. Part A
|August 19, 2003
Summary
Donnai Barrow syndrome, a rare genetic disorder, is characterized by diaphragmatic hernia, absent corpus callosum, and deafness. This study confirms its distinct nature and suggests autosomal recessive inheritance, aiding in diagnosing this rare condition.
Area of Science:
- Genetics
- Clinical Medicine
- Rare Diseases
Background:
- The Donnai Barrow syndrome (DBS) is a rare Mendelian disorder first described in 1993.
- It is characterized by a distinct set of congenital anomalies, including diaphragmatic hernia, exomphalos, absent corpus callosum, hypertelorism, myopia, and sensorineural deafness.
- Limited case reports since its initial description have hindered a comprehensive understanding of its prevalence and inheritance patterns.
Observation:
- This study details four new patients diagnosed with Donnai Barrow syndrome.
- Two of the reported patients are sibling pairs, originating from non-consanguineous, healthy parents.
- The clinical presentation in these four patients aligns with the previously established features of DBS.
Findings:
- The addition of these four cases significantly increases the number of documented individuals with Donnai Barrow syndrome.
- The occurrence in sibling pairs from unaffected parents provides further evidence supporting autosomal recessive inheritance.
- This expanded cohort strengthens the recognition of Donnai Barrow syndrome as a distinct clinical entity.
Implications:
- Establishing Donnai Barrow syndrome as a distinct entity aids clinicians in accurate diagnosis and genetic counseling.
- The evidence for autosomal recessive inheritance guides future genetic research and carrier screening.
- Further research into the molecular basis of Donnai Barrow syndrome is warranted to understand its pathogenesis and explore potential therapeutic strategies.