| hydroxykynureninuria | An abnormality in tryptophan metabolism, probably due to a defect in kynureninase, characterised by mild mental retardation, migraine-like headaches, and urinary excretion of large amounts of kynurenine, kynurenine-3-monooxygenase, and xanthurenic acid; autosomal recessive inheritance. (05 Mar 2000) |
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