Michael Grenzebach

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Even early-treated patients with phenylketonuria (PKU) have a higher risk of psychosocial maladjustment. This study was performed to determine whether emotional and behavioural problems are specific in phenylketonurics and whether they depend on the quality of biochemical control. This comparative study covered 42 PKU patients aged 10–18 years (mean 14.7(More)
Even early-treated phenylketonurics may suffer from phenylalanine-related deficits. Elevated phenylalanine concentrations can interfere with the development and function of the CNS. Outcome beyond childhood has not been extensively investigated. This long-term study was performed to determine whether adolescents and young adults with PKU show frontal(More)
BACKGROUND Cognitive impairment and fine motor deficits are frequent manifestations in patients with neurofibromatosis type 1 (NF1). More than 50% of patients with NF1 show focal areas of high signal intensity (T2H) on T2-weighted MRI of the brain. It has been hypothesized that T2H may be associated with the cognitive and motor problems. METHODS The(More)
Neuropsychologic studies have shown that even phenylketonuric patients treated early suffer from phenylalanine-related deficits in all age periods, from childhood to adulthood. This study was performed to determine whether phenylketonuric children show specific frontal lobe-dependent deficits when compared with diabetic patients. The comparative study(More)
Even early-treated phenylketonuric patients suffer from phenylalanine-associated (mild) neuropsychological impairment. To date it is still unclear whether patients' deficits show a progression on ageing. This unsolved question seems to be an important aspect in the still ongoing debate about how long and how strictly the patients should be maintained on(More)
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