Richard Koch

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We evaluated gonadal function in 18 female and eight male patients with galactosemia due to transferase deficiency; it was normal in the males, but 12 females had signs of hypergonadotropic hypogonadism. All female patients had a 46,XX karyotype, normal levels of thyroid hormone and prolactin, and no anti-ovarian antibodies. The biologic activity of urinary(More)
The major cause of hyperphenylalaninemia is mutations in the gene encoding phenylalanine hydroxylase (PAH). The known mutations have been identified primarily in European patients. The purpose of this study was to determine the spectrum of mutations responsible for PAH deficiency in the United States. One hundred forty-nine patients enrolled in the Maternal(More)
Summary: Adult subjects with classical phenylketonuria (PKU) who were diagnosed and treated neonatally participated in this long-term follow-up study. Twenty-four subjects received neuropsychological (NP) assessment and a subset received magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) to identify: (1) pattern of cognitive(More)
OBJECTIVES Clinicians caring for persons with phenylketonuria (PKU) have been perplexed by the occasional normal individual with the classical biochemical profile consistent with the diagnosis of PKU. Usually untreated subjects with the biochemical profile of blood phenylalanine (Phe) levels >1200 micromol/L are severely mentally retarded and may have(More)
Six subjects with classical phenylketonuria (PKU) were treated with large neutral amino acid supplements (PreKUnil, Nilab, Dk) at 0.4g/kg/day in equally divided doses three times each day on an increased natural protein diet. All six subjects had low or deficient blood concentrations of both tyrosine and tryptophan, which are precursors for dopamine and(More)
Blood lipid studies are reported in 25 adults and 2 adolescents with PKU who had been on phenylalanine-restricted diets for a mean period of 22.6 years (range 7[ndash ]39 years). Measurements included plasma concentrations of phenylalanine, cholesterol, lipoproteins, triglycerides and fatty acid profiles, including the analysis of seven fatty acids in(More)
Phenylketonuria (PKU, MIM 261600; EC results from mutations in the phenylalanine hydroxylase (PAH) gene. Newborn metabolic disease screening uses blood dried on filter paper (DBS) to prospectively identify candidate newborns affected with PKU via an elevated concentration of phenylalanine. However, it is then important to confirm the specific(More)
Deficiency of alpha-L-fucosidase in plasma and leukocytes has been demonstrated in three patients affected with fucosidosis. The measurement of plasma fucosidase activity alone is of little diagnostic value. Several normal individuals were found to have extremely low plasma alpha-L-fucosidase activity, but normal activity in leukocyte preparations. The low(More)
BACKGROUND Time-critical care of seriously injured patients is gaining more and more significance. The availability of the multi-slice CT allows a complete diagnostic assessment of injured patients in 90-240 s, but is presently carried out only at the conclusion of basic diagnostics. We investigated the effects of a clinical algorithm using multi-slice CT(More)