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Degree of Hypomyelination and Magnetic Resonance Spectroscopy Findings in Patients with Pelizaeus Merzbacher Phenotype
- Source :
- Neuropediatrics. 34:127-136
- Publication Year :
- 2003
- Publisher :
- Georg Thieme Verlag KG, 2003.
-
Abstract
- As only 10 - 30 % of patients with a Pelizaeus Merzbacher disease (PMD) phenotype carry mutations of the proteolipid protein (PLP) gene, we were interested if the degree and time-dependent progression of abnormal MRI and MRS findings would discriminate patients with mutations of the PLP gene (Pelizaeus Merzbacher disease, PMD) from patients without a defect of the PLP gene (Pelizaeus Merzbacher-like disease, PMLD). For a standardised intraindividual follow-up and for comparison of the degree of hypomyelination, we have applied a newly developed semiquantitative myelination score on a total of 18 MRI series of 4 PMD and 4 PMLD patients. We found severe hypomyelination (50 % of normal) in 2 PMD and in 2 PMLD patients, moderate hypomyelination (75 % of normal) in 2 PMD and mild hypomyelination (75 % of normal) in 2 PMLD patients. Our score revealed a clear correlation between the degree of hypomyelination and the severity of clinical handicap in PMD but not in PMLD patients. MRS showed heterogeneous cerebral metabolite patterns in both patient groups and seems to reflect a mixture of unspecific changes due to primary hypomyelination and secondary gliosis and demyelination. Neither by MRI nor by MRS were patterns found that would allow differentiation between PMD and PMLD patients.
- Subjects :
- Male
Pathology
medicine.medical_specialty
Magnetic Resonance Spectroscopy
Proteolipid protein 1
Adolescent
Pelizaeus-Merzbacher Disease
DNA Mutational Analysis
Nerve Fibers, Myelinated
Severity of Illness Index
Genetic determinism
Central nervous system disease
Degenerative disease
Severity of illness
Evoked Potentials, Auditory, Brain Stem
medicine
Humans
Point Mutation
Child
medicine.diagnostic_test
business.industry
Brain
Infant
Pelizaeus–Merzbacher disease
Magnetic resonance imaging
General Medicine
medicine.disease
DNA-Binding Proteins
Gliosis
Child, Preschool
Pediatrics, Perinatology and Child Health
Female
Neurology (clinical)
medicine.symptom
business
Follow-Up Studies
Transcription Factors
Subjects
Details
- ISSN :
- 14391899 and 0174304X
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- Neuropediatrics
- Accession number :
- edsair.doi.dedup.....8314078f9ff61446558942ed213c77df