Synonyms: Ring 20 | Ring chromosome 20
A rare chromosomal disorder characterized by childhood onset drug resistant epilepsy with typical electroencephalographic findings (EEG) mild to severe intellectual disability and behavioral problems.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version April 2026
Newly diagnosed with
Ring chromosome 20 syndrome?
Our RARE Concierge Services Guides are available to assist you by providing information, resources and connections as you navigate your rare disease journey.
Advocacy Organizations
Genetic Epilepsy Team Australia
Collaboration of research and care
Rare Chromosome Disorder Support Group – Unique
Through sharing knowledge and lived experience, Unique helps families and professionals navigate the world of chromosome and gene disorders
Rare Epilepsy Network (REN)
Improving outcomes of people with rare epilepsies through an innovative collaborative infrastructure that drives urgent, patient-centered research, educaiton and advocacy.
Ring20 Research and Support UK CIO
To provide support for individuals, families and healthcare professionals who are affected by, or who come into contact with Ring Chromosome 20 Syndrome or r(20) – a rare epilepsy syndrome – and to continuously foster interest and promote opportunities for research to improve understanding and outcomes for all those impacted.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.