Michael Grenzebach

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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)
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)
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)
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