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.
An oculopharyngodistal myopathy that is characterized by progressive muscle weakness with ocular, facial, pharyngeal, and distal limb involvement, resulting in dysarthria and gait difficulties and that has_material_basis_in heterozygous trinucleotide repeat expansion (CGG) in the 5-prime untranslated region (UTR) of the NOTCH2NLC gene on chromosome 1q21. (DO)