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 lipoma that is characterized as a benign well-circumscribed tumor, composed of lobules of mature adipocytes, that arises within subcutaneous tissue, deep soft tissues or on the surface of bones. (DO)