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.
Term:
polymorphous low grade neuroepithelial tumour of the young
A central nervous system benign neoplasm that is characterized by the presence of oligodendroglioma-like components, may also contain astrocytic components and is associated with seizures and in many cases refractory epilepsy. (DO)