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.
Term:
neurodevelopmental disorder with midbrain and hindbrain malformations
A syndromic intellectual disability characterized by mild microcephaly, midbrain-hindbrain malformations, decreased reflexes, impaired fine motor movements, and variable dysmorphic features that has_material_basis_in homozygous mutation in ARHGEF2 on chromosome 1q22. (DO)