Phenylketonuria in Pediatric Neurology Practice: A Series of 146 Cases

Author:

Yalaz Kalbiye1,Vanli Lale2,Yilmaz Engin3,Tokatli Aysegul4,Anlar Banu5

Affiliation:

1. Department of Pediatric Neurology Hacettepe University

2. Turkish Intelligence Foundation

3. Department of Medical Biology Hacettepe University

4. Department of Metabolic Disorders Hacettepe University

5. Department of Pediatric Neurology Hacettepe University Ankara, Turkey, .

Abstract

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).

Publisher

SAGE Publications

Subject

Neurology (clinical),Pediatrics, Perinatology and Child Health

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