Overview
Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome is an extremely rare genetic condition that affects multiple body systems, particularly the brain and nervous system. The disease is characterized by a combination of serious movement problems (severe motor disability), significant learning and thinking difficulties (intellectual disability), hearing loss caused by nerve damage in the inner ear (sensorineural deafness), and dystonia, which involves involuntary muscle contractions that cause abnormal postures or twisting movements. This condition typically becomes apparent very early in life. Affected children show profound delays in reaching developmental milestones such as sitting, standing, and walking. Many individuals are unable to walk independently or communicate verbally. The hearing loss can range from moderate to profound and further complicates communication and learning. Dystonia can affect various parts of the body and may cause significant discomfort and difficulty with daily activities. Because this syndrome is so rare, treatment options are currently limited to managing individual symptoms. There is no cure available at this time. Care typically involves a team of specialists working together to address the movement difficulties, hearing loss, and developmental needs of the affected individual. Supportive therapies such as physical therapy, occupational therapy, speech therapy, and hearing aids or cochlear implants may be recommended to improve quality of life.
Also known as:
Key symptoms:
Severe intellectual disabilityInability to walk or severe difficulty with movementHearing loss present from birth or early infancyInvoluntary muscle contractions causing abnormal postures (dystonia)Severe speech and language delays or absence of speechDifficulty feeding or swallowingLow muscle tone in early lifeDelayed developmental milestonesSeizures in some casesAbnormal eye movementsPoor head controlLimited ability to use hands purposefullyGrowth delays
Clinical phenotype terms (20)— hover any for plain English
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Neonatal
Begins at or shortly after birth (first 4 weeks)
Treatments
No FDA-approved treatments are currently listed for Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome.
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Specialists
View all specialists →No specialists are currently listed for Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What specific genetic mutation does my child have, and what does it mean for their condition?,What therapies should we start right away to give my child the best chance at development?,Would hearing aids or cochlear implants be appropriate for my child's type of hearing loss?,What medications can help manage the dystonia, and what are the side effects?,Are there any clinical trials or research studies we should know about?,What is the risk of having another child with this condition, and should we pursue genetic counseling?,What emergency signs should we watch for at home, and when should we go to the hospital?
Common questions about Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome
What is Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome?
Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome is an extremely rare genetic condition that affects multiple body systems, particularly the brain and nervous system. The disease is characterized by a combination of serious movement problems (severe motor disability), significant learning and thinking difficulties (intellectual disability), hearing loss caused by nerve damage in the inner ear (sensorineural deafness), and dystonia, which involves involuntary muscle contractions that cause abnormal postures or twisting movements. This condition typically beco
How is Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome inherited?
Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome typically begin?
Typical onset of Severe motor and intellectual disabilities-sensorineural deafness-dystonia syndrome is neonatal. Age of onset can vary across affected individuals.