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Clinical presentations of Ehlers Danlos syndrome type IV
F M Pope1, P Narcisi, A C Nicholls
1Medical Research Council, Clinical Research Centre, Harrow.
Insights
Ehlers-Danlos syndrome type IV, a severe genetic disorder affecting type III collagen, presents in infancy with distinct symptoms. Early diagnosis and prenatal testing are crucial for managing this often lethal condition and preventing fatal complications like arterial rupture.
Area of Science:
- Genetics
- Biochemistry
- Pediatrics
Background:
- Ehlers-Danlos syndrome type IV (EDS IV) is a severe, often lethal genetic connective tissue disorder.
- It stems from mutations in genes responsible for producing type III collagen, a critical protein for tissue integrity.
Observation:
- EDS IV manifests in infancy and childhood with symptoms including low birth weight, prematurity, hip dislocation, easy bruising, and a characteristic facial appearance.
- Clinical presentation can be mistaken for non-accidental trauma, highlighting the need for accurate diagnosis.
Findings:
- Affected individuals face a high risk of life-threatening arterial rupture in early to middle adulthood.
- Diagnostic methods include radiolabeled collagen protein analysis via polyacrylamide gel electrophoresis.
- Prenatal diagnosis is achievable through specific type III collagen gene analysis, offering crucial family planning options.
Implications:
- Early and accurate diagnosis of EDS IV is vital for patient management and risk assessment.
- Prenatal diagnosis and genetic counseling can prevent disease transmission in affected families.
- Advancements in genetic testing promise wider availability of prenatal diagnosis and potential preventative strategies for EDS IV.
Abstract:
Ehlers Danlos syndrome type IV is an often lethal disease caused by various mutations of type III collagen genes. It presents in infancy and childhood in several ways, and the symptoms and signs include low birth weight, prematurity, congenital dislocation of the hips, easy inappropriate bruising (sometimes suspected as child battering), and a diagnostic facial phenotype. These features predict a lethal adult disease often complicated by fatal arterial rupture in early or middle adult life. Most affected patients can be diagnosed from radiolabelled collagen protein profiles by polyacrylamide gel electrophoresis. Prenatal diagnosis by specific type III collagen restriction fragment length polymorphisms is possible in some families, and will become increasingly important. Prenatal diagnosis and prevention of the disease in selected families is already possible and will be widely available in the future.