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 hereditary spastic paraplegia that is characterized by spasticity of the leg muscles, progressive muscle weakness, paraplegia, muscle wasting in the hands and feet (distal amyotrophy), small stature, developmental delay, learning disorders, speech difficulties (dysarthria), and mood swings, and has_material_basis_in a mutation of the SPG20 gene. (DO)
ClinVar Annotator: match by term: SPART-related condition | ClinVar Annotator: match by term: Troyer syndrome CTD Direct Evidence: marker/mechanism OMIM:275900