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Eight-Year Evaluation of Treatment

JOHN I. LANGDELL, MD

Arch Gen Psychiatry. 1965;12(4):363-367.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

PHENYLKETONURIA is an inborn metabolic disorder that has caused the mental deficiency of 1% of patients in institutions for the mentally retarded. By brilliant clinical detective work, Føiling discovered the disease in 1934.^4-6 Jervis demonstrated the basic defect to be the absence of the liver enzyme that normally converts phenylalanine to tyrosine.⁷ In 1953 Bickel reported an effective chemically produced dietary treatment for the disease.¹ It has since been established that children who have phenylketonuria can develop normal mentality if diagnosed and treated within a month or two after birth.⁸ It is yet to be determined whether the diet should be given for a lifetime, until a certain age, or for a determinable period of time.¹⁰

With the diagnoses of two phenylketonuric children in the course of psychiatric evaluations in 1956, we have had an opportunity to conduct a long-term evaluation . . . [Full Text PDF of this Article]

Author Affiliations
SAN FRANCISCO

Assistant Clinical Professor of Psychiatry, University of California School of Medicine and Supervising Psychiatrist, Children's Service, Langley Porter Neuropsychiatric Institute.

Footnotes
Submitted for publication Nov 2, 1964.

Revised from "Phenylketonuria—An Evaluation of Seven Years of Dietary Treatment," which was read before the American Psychiatric Association, Los Angeles, May 8, 1964.

Reprint requests to 401 Parnassus Ave, San Francisco, Calif, 94122.

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