J
Jaap Valk
Researcher at University of Amsterdam
Publications - 6
Citations - 310
Jaap Valk is an academic researcher from University of Amsterdam. The author has contributed to research in topics: L2HGDH & Porencephaly. The author has an hindex of 5, co-authored 6 publications receiving 300 citations.
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Journal ArticleDOI
L-2-hydroxyglutaric acidemia: a novel inherited neurometabolic disease.
Peter G. Barth,Georg F. Hoffmann,Jaak Jaeken,Willy Lehnert,Folker Hanefeld,Albert H. van Gennip,Marinus Duran,Jaap Valk,Ruud B.H. Schutgens,Friedrich K. Trefz,Gabriele Reimann,Hans-Peter Hartung +11 more
TL;DR: A novel inherited neurometabolic disease, probably autosomal recessive, with distinct clinical, biochemical, and neuroimaging features is described, and the elevated CSF/plasma ratio suggests that it is in part generated within the central nervous system.
Journal ArticleDOI
L-2-hydroxyglutaric acidaemia: clinical and biochemical findings in 12 patients and preliminary report on L-2-hydroxyacid dehydrogenase.
Peter G. Barth,Georg F. Hoffmann,Jaak Jaeken,R. J. A. Wanders,Marinus Duran,Gerbert A. Jansen,C.A.J.M. Jakobs,Willy Lehnert,Folker Hanefeld,Jaap Valk,Ruud B.H. Schutgens,Friedrich K. Trefz,Hans-Peter Hartung,N. A. Chamoles,Z. Sfaello,Ubaldo Caruso +15 more
TL;DR: This autosomal recessively inherited disease is expressed as progressive ataxia, mental deficiency with subcortical leukoencephalopathy and cerebellar atrophy on magnetic resonance imaging, and further investigations are required to clarify the possible relevance to the metabolic defect inl-2-hydroxyglutaric acidaemia.
Journal ArticleDOI
Malformations of the spinal cord in 53 patients with spina bifida studied by magnetic resonance imaging.
TL;DR: The results point to the fact that in the pediatric age group, associated spinal defects often remain asymptomatic.
Journal ArticleDOI
Familial porencephalic white matter disease in two generations
TL;DR: This is probably the first report of "porencephaly" which shows a pattern of autosomal dominant inheritance, and preliminary evidence of a primary disease of myelination, in the absence of histopathological confirmation.
Journal ArticleDOI
Malformation or damage of the corpus callosum? A clinical and MRI study
TL;DR: Children with acquired CC anomalies have signs of supposed Interhemispheric Disconnection, which is partly responsible for their clinical syndrome of mental and motor retardation, and the likelihood of finding a CC anomaly in a child seems to be enhanced by the predictive use of neuropsychological tasks indicative for ID.