RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A purine-pyrimidine metabolic disorder characterized by deficiency of xanthine oxidase, resulting in excretion of large amounts of xanthine in the urine and the formation of xanthine stones. (DO)
ClinVar Annotator: match by term: Xanthine dehydrogenase and aldehyde oxidase combined deficiency of | ClinVar Annotator: match by term: Xanthinuria type II