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Osteogenesis imperfecta with congenital joint contractures (Bruck syndrome)
D Viljoen1, G Versfeld, P Beighton
1Department of Human Genetics, Medical School, University of Cape Town, South Africa.
Insights
Children with osteogenesis imperfecta (OI) can present with congenital contractures. This study suggests these cases represent a distinct syndrome, potentially "Bruck syndrome," characterized by joint immobility during fetal development.
Area of Science:
- Medical Genetics
- Pediatrics
- Orthopedics
Background:
- Osteogenesis imperfecta (OI) is a group of genetic disorders characterized by fragile bones.
- Congenital contractures are joint deformities present at birth.
Observation:
- Five children from unrelated families presented with symmetrical contractures of knees, ankles, and feet.
- Initial diagnosis of arthrogryposis multiplex was revised to osteogenesis imperfecta due to frequent fractures after walking.
- The contractures appeared before fractures, suggesting intra-uterine immobility.
Findings:
- The consistent pattern of contractures and OI phenotype suggests a specific syndromic entity.
- A similar case described by Alfred Bruck in 1897 supports this observation.
- The proposed designation is "Bruck syndrome" for this specific presentation.
Implications:
- This research may lead to a new eponymous syndrome, "Bruck syndrome," for a specific subset of OI.
- Understanding the pathogenesis of congenital contractures in OI is crucial for early diagnosis and management.
- Further research is needed to elucidate the genetic and developmental factors underlying Bruck syndrome.
Abstract:
Five children from three unrelated families were born with symmetrical contractures of the knees, ankles and feet. An initial diagnosis of arthrogryposis multiplex was made, but frequent fracturing occurred after walking commenced and it was then recognised that the children had osteogenesis imperfecta. The pathogenesis of the congenital contractures is unknown, but the symmetry and lack of evidence of prior fracturing is suggestive of articular immobility during early intra-uterine development. The consistency of the anatomical distribution of the contractures, in the setting of a uniform OI phenotype, is suggestive of syndromic identity. A similar case was documented by Alfred Bruck in 1897 and we propose that the eponymous designation "Bruck syndrome" should be applied to the disorder.