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 congenital bile acid synthesis defect characterized by hepatomegaly, liver fibrosis and failure, splenomegaly, and elevated plasma levels of bile acid intermediates that has_material_basis_in homozygous mutation in the ABCD3 gene on chromosome 1p21. (DO)