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 facioscapulohumeral muscular dystrophy characterized by adult onset of proximal muscle weakness affecting the face, neck, scapular muscles, and upper and lower limbs that has_material_basis_in the combination of a homozygous mutation in the LRIF1 gene on chromosome 1p13 and presence of a haplotype on chromosome 4 that is permissive for DUX4 expression. (DO)