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 syndromic microphthalmia characterized by microphthalmia, cleft lip and palate, and agenesis of the corpus callosum that has_material_basis_in homozygous or compound heterozygous mutation in VAX1 on chromosome 10q25.3. (DO)