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Lethal syndrome of skeletal dysplasia and progressive central nervous system degeneration
M Khosravi1, D D Weaver, M J Bull
1Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis 46202-5251, USA.
Insights
This study identifies a new inherited syndrome in infants characterized by bone dysplasia and progressive central nervous system (CNS) degeneration. The condition leads to severe congenital anomalies and early death, suggesting a novel autosomal recessive genetic disorder.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- Congenital anomalies and neurodegenerative disorders in infants present diagnostic challenges.
- Understanding the genetic basis of rare syndromes is crucial for diagnosis and potential therapies.
Observation:
- Three siblings presented with multiple congenital anomalies, poor growth, seizures, and progressive central nervous system (CNS) degeneration.
- Radiographic findings included short long bones, platyspondyly, and hypoplastic pelvis.
- Autopsies revealed diffuse encephalomyelopathy and enlarged ventricles.
Findings:
- Lysosomal enzyme activities and collagen type II were normal in affected infants.
- Chromosomal analysis did not reveal abnormalities.
- The clinical presentation and radiographic findings, while sharing some features with Dyggve-Melchior-Clausen syndrome, represent a distinct new syndrome.
Implications:
- This research describes a novel autosomal recessive syndrome of bone dysplasia and CNS degeneration.
- Identifies a new genetic disorder impacting infant development and survival.
- Highlights the importance of detailed clinical and pathological examination for diagnosing rare pediatric syndromes.
Abstract:
We describe 3 sibs (2 males and 1 female) with multiple congenital anomalies, poor growth, seizures, and progressive central nervous system (CNS) degeneration leading to death in infancy. Radiographic changes in all 3 were similar, and included moderate shortness of long bones, platyspondyly, and hypoplastic pelvis. Autopsies showed diffuse encephalomyelopathy and enlargement of the lateral and third ventricles. Lysosomal enzyme activities were normal. Collagen type II analysis on 2 of the sibs indicated normal collagen. Chromosomes appeared normal. Even though the radiographic and chondroosseous morphologic findings in these sibs have a certain similarity to Dyggve-Melchior-Clausen syndrome, their clinical course does not fit this condition. These infants appear to represent a new syndrome of bone dysplasia and CNS degeneration inherited as an autosomal recessive trait.