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 ring chromosome syndrome characterized by recognizable epileptic phenotype with typical EEG pattern, intellectual disability manifesting after seizure onset in otherwise normally developing children, and behavioral changes that has_material_basis_in chromosome 20 fusion into a ring or ring-like structure. (DO)
Synonyms:
exact_synonym:
R(20) Syndrome; Ring 20 Syndrome; Ring Chromosome 20; Ring Chromosome 20 Epilepsy Syndrome; r20 syndrome