Nonphenylketonuric hyperphenylalaninemia

M. J. Lang, R. Koch, K. Fishler and R. Baker
Department of Education, University of Southern California, Los Angeles.

Sixteen subjects with nonphenylketonuric hyperphenylalaninemia were followed up during a period of years. Dietary treatment did not seem to influence the outcome, and no relationship between blood phenylalanine and intellectual outcome was demonstrable.