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 postnatal growth failure, severely delayed psychomotor development, variable dysmorphic features, and hypotonia and has_material_basis_in X-linked recessive or X-linked dominant mutation in the NAA10 gene on chromosome Xq28. (DO)