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 syndrome characterized by Alport syndrome, mental retardation, midface hypoplasia, and elliptocytosis that has_material_basis_in hemizygous deletion of multiple genes including COL4A5, FACL4 and AMMECR1 on chromosome Xq22.3. (DO)