Multiple mitochondrial dysfunctions syndrome type 4

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Multiple mitochondrial dysfunctions syndrome type 4

Synonyms: MMDS4

A rare severe genetic neurometabolic disease characterized by infantile-onset of progressive neurodevelopmental regression optic atrophy with nystagmus and diffuse white matter disease. Affected individuals usually have central hypotonia that progresses to limb spasticity and hyperreflexia eventually resulting in a vegetative state. Recurrent chest infections are frequently associated and seizures (usually generalized tonic-clonic) may occasionally be observed. Brain magnetic resonance imaging shows diffuse bilateral symmetric abnormalities in the cerebral periventricular white matter with variable lesions in other areas but sparing the basal ganglia.

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 Data version February 2024

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Multiple mitochondrial dysfunctions syndrome type 4?

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Advocacy Organizations

Genetic Support Network of Victoria

The Genetic Support Network of Victoria is an organisation that supports people living with genetic, undiagnosed and rare conditions and those who support them including community and families, patient support organisations, health professionals and industry. Our vision is our community flourishing and living their best lives.


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.

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.

Clinical Trials

For a list of clinical trials in this disease area, please click here.