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Developmental Medicine and Child Neurology 1996-Nov

Pyridoxine-dependent seizures: demographic, clinical, MRI and psychometric features, and effect of dose on intelligence quotient.

Samo registrirani uporabniki lahko prevajajo članke
Prijava / prijava
Povezava se shrani v odložišče
P Baxter
P Griffiths
T Kelly
D Gardner-Medwin

Ključne besede

Povzetek

A regional population-based survey identified six patients with pyridoxine dependency. Four presented on the first day of life and the other two at 1 and 8 months of age. Apart from multiple seizure types, other presenting features included jitteriness; encephalopathy, at first thought to be hypoxic-ischaemic; hepatomegaly, and abdominal distension with bilious vomiting. Later problems included break-through fits with fever; transient visual agnosia; squint; severe articulatory apraxia; motor delay with later dyspraxia; macrocephaly, and post-haemorrhagic hydrocephalus. Magnetic resonance imaging showed variable structural abnormalities in all the early onset cases. Psychometric assessment revealed a stereotyped pattern of intelligence scale subtest scores, with a specific impairment of expressive verbal ability. In a prospective open study over one year, an increased dose of pyridoxine was associated with an improvement in IQ, particularly in performance subtests. Pyridoxine dependency is more common than has been thought. It has a wider range of clinical features than the classical neonatal seizures and causes specific impairments of higher function, some of which may be reversible. The dosage of pyridoxine should be optimal for IQ as well as seizure control.

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