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 early-onset retinal degeneration, sensorineural hearing loss, short stature, vertebral anomalies, epiphyseal dysplasia, and motor and intellectual delay that has_material_basis_in homozygous or compound heterozygous mutation in NMNAT1 on chromosome 1p36.22. (DO)