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Connatal Pelizaeus-Merzbacher disease in two girls
F Ziereisen1, B Dan, F Christiaens
1Department of Radiology, Hôpital Universitaire des Enfants Reine Fabiola, Brussels, Belgium.
Pediatric Radiology
|August 10, 2000
Abstract:
We report the clinical, radiological and electrophysiological signs in two unrelated girls with the connatal form of Pelizaeus-Merzbacher disease (PMD). MRI plays an important role in the diagnosis, demonstrating the virtual absence of myelination. PMD is classically described as an X-linked leukodystrophy. Our two cases reinforce the hypothesis of a possible autosomal recessive transmission of the connatal form of PMD in some families, as recently presented.
Insights
This study details two girls with Pelizaeus-Merzbacher disease (PMD), highlighting MRI
Area of Science:
- Neurology
- Genetics
- Radiology
Background:
- Pelizaeus-Merzbacher disease (PMD) is a rare, X-linked leukodystrophy.
- The connatal form presents at birth with severe neurological deficits.
- Genetic mutations in the PLP1 gene are the primary cause of PMD.
Observation:
- Two unrelated female infants presented with clinical, radiological, and electrophysiological signs of connatal PMD.
- Magnetic Resonance Imaging (MRI) revealed a near-complete absence of myelination in the central nervous system.
- Clinical manifestations included severe motor and cognitive impairments.
Findings:
- The observed cases in females challenge the classical X-linked inheritance pattern of PMD.
- Findings support a potential autosomal recessive inheritance for the connatal form of PMD in specific families.
- Genetic analysis is crucial for accurate diagnosis and understanding inheritance patterns.
Implications:
- These findings may necessitate re-evaluation of diagnostic approaches for PMD, particularly in female patients.
- Understanding alternative inheritance patterns can improve genetic counseling and family planning for affected individuals.
- Further research into the genetic basis of PMD is warranted to identify all causative mutations and inheritance modes.