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 congenital myasthenic syndrome characterized by autosomal recessive inheritance of postsynaptic neuromuscular junction defects resulting in rapid decay in endplate current and a failure to reach the threshold for depolarization and early onset progressive muscular weakness that has_material_basis_in homozygous or compound heterozygous mutation in the CHRND gene on chromosome 2q37. (DO)