Synonyms: Infantile subacute necrotizing encephalopathy | Leigh disease
A progressive neurological disease defined by specific neuropathological features associating brainstem and basal ganglia lesions.
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 July 2026
Newly diagnosed with
Leigh syndrome?
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Advocacy Organizations
Access to Life NGO
Access to Life is Ukraine’s first patient advocacy organization for rare genetic epilepsies, anchored in Dravet syndrome and SCN1A-related conditions. We support 600+ families nationwide, advocate for a national clinical protocol and drug access, and are building Ukraine’s National Patient Resource Centre and Patient Registry for genetic epilepsies.
Charcot-Marie-Tooth Association
Our mission … to support the development of new treatments for CMT, to improve the quality of life for people with CMT, and, ultimately, to find a cure. Our vision … a world without CMT. CMTA was started by patients in 1986, and to this day is powered by a community of patients who are engaged in helping carry out and support our mission.
Cure Mito Foundation
Our mission is to empower families to come together with a common goal of finding treatments, and ultimately a cure, for this devastating disease.
CureARS
Our Mission is to spread awareness, connect and provide support to affected families and fund research for the ultra-rare Mitochondrial Aminoacyl t-RNA Synthetase (mtARS) genes in order to pave the way to suitable treatment options and ultimately a cure.
Genetic Epilepsy Team Australia
Collaboration of research and care
Legacy Bridges Foundation, Inc
The Legacy Bridges Foundation, Inc. is a 501(c)3 non-profit organization founded to bridge the gap to support, educate and advocate for individuals, families and caregivers of those living with epilepsy and other seizure related disorders. The Legacy Bridges Foundation, Inc. is dedicated to helping champions live a sustainable life through participation of essential supportive programs and service
Louisiana Metabolic Disorders Coalition
We support, educate, and advocate for patients & families affected by metabolic disorders.
Mississippi Metabolics Foundation
Our mission at Mississippi Metabolics Foundation (MMF) is to advocate, educate, and support families in MS affected by genetic metabolic disorders/inborn errors of metabolism (IEM's). MMF promotes initiatives and further advancements in legislation, education, research, clinical trials, studies, therapies, targeted treatments, and eventual cures for IEM’s and all rare diseases.
MitoAction
MitoAction’s mission is to improve the quality of life for children, adults, and families living with mitochondrial disease through support, education, outreach, advocacy, clinical research initiatives and by granting wishes for children affected by mitochondrial disease.
MitoCanada
MitoCanada's mission is to create a world where all lives are powered by healthy mitochondria. We are dedicated to supporting Canadians living with mitochondrial disease by developing education and awareness programs, advocating to improve the health and quality of life of those living with mito at provincial and federal levels, and we fund research that is patient-focused and transformational.
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.
RareDNA Foundation
Dedicated to improving outcomes for individuals and families affected by rare DNA heart mutations by advancing awareness, access and action. We increase awareness among medical professionals and the public, provide education and resources on diagnosis and treatment, support scientific research, and advocate for faster diagnostic pathways, giving families the knowledge and care they need.
The Mito Foundation
The Mito Foundation is the only organisation dedicated to supporting and empowering people affected by mitochondrial disease (mito) in Australia. It provides resources and support services for people impacted by mito, and their families, while working to transform outcomes for the mito community by driving meaningful change and funding essential research into the prevention, diagnosis & treatments
Uganda Alliance of Patients Organization
Supporting patients to access quality, safe and patient-centered healthcare services.
United Mitochondrial Disease Foundation (UMDF)
Promoting research and education for the diagnosis, treatment and cure of mitochondrial disorders and to provide support to affected individuals and families. We are driven by a nationwide community of ambassadors solely focused on supporting patients and families affected by mitochondrial disease. We are committed and energized to make a difference by funding the best science in the world.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.