Phenylketonuria in Pediatric Neurology Practice: A Series of 146 Cases

The neurologic manifestations of patients with phenylketonuria treated at different ages are illustrated in this series of 146 cases, including 9 sib pairs. In addition to well-known findings such as mental retardation, autistic features, microcephaly, and tremor, motor retardation was common and re...

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Bibliographic Details
Published in:Journal of child neurology 2006-11, Vol.21 (11), p.987-990
Main Authors: Yalaz, Kalbiye, Vanli, Lale, Yilmaz, Engin, Tokatli, Aysegul, Anlar, Banu
Format: Article
Language:English
Subjects:
Age Factors
Child
Child, Preschool
Female
Humans
Infant
Infant, Newborn
Intellectual Disability - etiology
Intellectual Disability - prevention & control
Male
Muscle Hypotonia - etiology
Muscle Hypotonia - prevention & control
Phenylketonurias - complications
Phenylketonurias - diet therapy
Siblings
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Summary:The neurologic manifestations of patients with phenylketonuria treated at different ages are illustrated in this series of 146 cases, including 9 sib pairs. In addition to well-known findings such as mental retardation, autistic features, microcephaly, and tremor, motor retardation was common and responded promptly to dietary treatment. Hypotonia and diminished reflexes were more frequent findings than hypertonia. Four sib pairs showed divergent features, such as the later-treated sibling having higher function than the early-treated one. Because siblings have a similar genotype and similar environmental and dietary conditions, this observation can be explained by differences in phenylalanine transport to the brain or additional metabolic or perinatal factors influencing the neurologic outcome. (J Child Neurol 2006;21:987—990; DOI 10.2310/7010.2006.00228).
ISSN:0883-0738
1708-8283
DOI:10.1177/08830738060210111401