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 syndrome characterized by multiple fetal developmental defects including polydactyly and central nervous system malformations that results from a single amino acid mutation of D211G of the HYLS1 gene which plays a central role in cilia formation. (DO)