Evaluation of Treatment Begun in First Three Months of Life in 184 Cases of Phenylketonuria

Data on 184 patients (of whom 15 were treated at Alder Hey Children9s Hospital), who began treatment for phenylketonuria (PKU) in the first three months of life, are presented and reviewed. The intelligence and physique of these patients are slightly below average, but the majority do not show evidence of severe mental subnormality such as usually occurs in untreated PKU.