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 LADD syndrome that has_material_basis_in heterozygous mutation in the tyrosine kinase domain of the FGFR3 gene on chromosome 4p16 and that is mainly affecting lacrimal glands and ducts, salivary glands and ducts, ears, teeth, and distal limb segments. (DO)