Abstract:Neonatal screening aims to detect serious but treatable diseases in neonates. A positive screening for phenylketonuria (PKU) does not necessarily mean hyperphenylalaninemia as a consequence of classic PKU. We report on a female patient diagnosed with dihydropteridin reductase (DHPR) deficiency through neonatal screening. This is a rare inborn error of the biopterin metabolism, characterized by a more severe neurological involvement compared to classic PKU. A diagnostic oral tetrahydrobiopterin (BH4) loading te… Show more
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