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.
An osteochondrodysplasia that has_material_basis_in a mutation in the COL2A1 gene which affects bone growth and results_in a small body, hydrops fetalis, and abnormal ossification located_in vertebral column or located_in pelvis. The disease has_symptom enlarged abdomen. (DO)