Xanthinuria, also known as hereditary xanthinuria, is related to xanthinuria, type i and xanthinuria, type ii. An important gene associated with Xanthinuria is XDH (Xanthine Dehydrogenase), and among its related pathways/superpathways are Metabolism and Metabolism of water-soluble vitamins and cofactors. Affiliated tissues include kidney and skeletal muscle, and related phenotypes are decreased urinary urate and hypouricemia