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Is mental retardation necessarily severe in all cases of PKU?

April 26, 2017cases mental retardation necessarily PKU severe

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Is mental retardation necessarily severe in all cases of PKU?

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=> There is a spectrum of severity in mental retardation, but most cases (if untreated) are associated with an IQ below 30. Microcephaly is present in 68% of untreated cases; seizures present in 25% of untreated cases.