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 chromosomal deletion syndrome that has_material_basis_in a contiguous deletion of the 1q21.1 region on chromosome 1 and is characterized by an increases the risk of delayed development, intellectual disability, physical abnormalities, and neurological and psychiatric problems. (DO)
CTD Direct Evidence: marker/mechanism ClinVar Annotator: match by term: 1q21.1 Deletion | ClinVar Annotator: match by term: Chromosome 1q21.1 deletion syndrome