Overview
Developmental malformations-deafness-dystonia syndrome is a very rare genetic condition that affects multiple parts of the body, particularly the brain, ears, and muscles. It is sometimes referred to by its Orphanet code ORPHA:79107. This syndrome is caused by changes (mutations) in the TIMM8A gene, which plays an important role in how cells produce energy inside tiny structures called mitochondria. Because this gene is located on the X chromosome, the condition mainly affects males, though some female carriers may have milder symptoms. The main features of this syndrome include problems with brain and body development that are present from birth or early childhood, significant hearing loss (deafness), and dystonia — a movement disorder where muscles contract involuntarily, causing twisting, repetitive movements, or abnormal postures. Some people also experience intellectual disability, vision problems, and heart abnormalities. The combination of these features can vary from person to person. There is currently no cure for this syndrome. Treatment focuses on managing symptoms and improving quality of life. This may include hearing aids or cochlear implants for deafness, medications or physical therapy for dystonia, and educational support for developmental delays. A team of specialists is usually needed to provide the best care.
Key symptoms:
Hearing loss or deafnessDystonia (involuntary muscle contractions causing twisting movements or abnormal postures)Intellectual disability or developmental delayBrain structural abnormalities present from birthVision problems or optic nerve issuesHeart defects or abnormalitiesDifficulty with movement and coordinationMuscle weakness or low muscle toneSpeech and language delaysFeeding difficulties in infancy
Clinical phenotype terms (21)— hover any for plain English
X-linked recessive
Carried on the X chromosome; typically affects males more than females
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for Developmental malformations-deafness-dystonia syndrome.
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Specialists
View all specialists →No specialists are currently listed for Developmental malformations-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 Developmental malformations-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 change was found in the TIMM8A gene, and what does it mean for my child's health?,What specialists should be part of my child's care team, and how often should we see each one?,Are there any clinical trials or research studies that my child might be eligible for?,What therapies are most important to start right away, and what outcomes can we realistically expect?,Should other family members be tested for carrier status, and what does that mean for future pregnancies?,What signs or symptoms should prompt an emergency visit or urgent call to the doctor?,Are there any patient support groups or family networks for this condition that we can connect with?
Common questions about Developmental malformations-deafness-dystonia syndrome
What is Developmental malformations-deafness-dystonia syndrome?
Developmental malformations-deafness-dystonia syndrome is a very rare genetic condition that affects multiple parts of the body, particularly the brain, ears, and muscles. It is sometimes referred to by its Orphanet code ORPHA:79107. This syndrome is caused by changes (mutations) in the TIMM8A gene, which plays an important role in how cells produce energy inside tiny structures called mitochondria. Because this gene is located on the X chromosome, the condition mainly affects males, though some female carriers may have milder symptoms. The main features of this syndrome include problems with
How is Developmental malformations-deafness-dystonia syndrome inherited?
Developmental malformations-deafness-dystonia syndrome follows a x-linked recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Developmental malformations-deafness-dystonia syndrome typically begin?
Typical onset of Developmental malformations-deafness-dystonia syndrome is infantile. Age of onset can vary across affected individuals.