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Executive dysfunction in treated phenylketonuric patients

 

 

 

Eur Child Adolesc Psychiatry. 2009 Feb 16. [Epub ahead of print]

 

Executive dysfunction in treated phenylketonuric patients.

 

Azadi B, Seddigh A, Tehrani-Doost M, Alaghband-Rad J, Ashrafi MR. Child and Adolescent Psychiatry Dept., Institute of Psychiatry (IOP), King's College London, London, UK, This email address is being protected from spambots. You need JavaScript enabled to view it. .

 

 

OBJECTIVES: Executive function deficits have been described in early and continuously treated patients with phenylketonuria (PKU). The aim of this study was to examine performance on executive function tasks of treated patients with PKU diagnosed by 2 years of age.

 

PATIENTS AND METHODS: Ten patients with PKU and normal intelligence score who were diagnosed before the age of 2 years and subsequently treated continuously, were compared with 15 typically developing control children on a battery of neuropsychological tests, including the tower of London (TOL), continuous performance test (CPT), and Stroop test.

 

RESULTS: PKU cases showed significantly poorer performance on the TOL task compared to the control group with the difference being significant in the first three levels of the test. With the CPT, PKU cases had significantly more omission errors than control subjects. On the Stroop test there was no statistically significant difference between the groups. No significant correlation was found between the concurrent serum phenylalanine (Phe) level and results of the executive tests in PKU patients.

 

CONCLUSION: This study identified executive dysfunction in early-treated PKU patients with normal IQ, particularly in the planning and attention domains. Further studies are required to compare the results with those from other neurodevelopmental disorders such as ADHD and autism, to establish whether the pattern of findings is specific to PKU.

 

PMID: 19221856 [PubMed - as supplied by publisher]

 


 

 

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