hydroxykynureninuria hy·drox·y·ky·nu·re·ni·nu·ri·a (hī-drŏk’sē-kī-nur’ə-nĭ-nur’ē-ə, -nyur’ə-nĭ-nyur’-)
An inherited abnormality in tryptophan metabolism believed to be due to a defect in kynureninase and characterized by mild mental retardation, migrainelike headaches, and urinary excretion of excessive amounts of kynurenine and xanthurenic acid.


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